Importance and Purpose:
Teach ye the Cause of God, O people of Baha, for God hath prescribed unto every one the duty of proclaiming His Message, and regardeth it as the most meritorious of all deeds. Such a deed is acceptable only when he that teacheth the Cause is already a firm believer in God, the Supreme Protector, the Gracious, the Almighty. He hath, moreover, ordained that His Cause be taught through the power of men’s utterance, and not through resort to violence.
(Baha’u’llah: Gleanings, p. 278)

It is better to guide one soul than to possess all that is on earth, for as long as that guided soul is under the shadow of the Tree of Divine Unity, he and the one who hath guided him will both be recipients of God’s tender mercy, whereas possession of earthly things will cease at the time of death. The path to guidance is one of love and compassion, not of force and coercion.
(The Bab: Selections from the Bab, p. 77)

Of all the gifts of God the greatest is the gift of Teaching. It draweth unto us the Grace of God and is our first obligation.
(`Abdu’l-Baha: Will and Testament, p. 25)

Unless these Teachings are effectively spread among the people, until the old ways, the old concepts, are gone and forgotten, this world of being will find no peace, nor will it reflect the perfections of the Heavenly Kingdom. Strive ye with all your hearts to make the heedless conscious, to waken those who sleep, to bring knowledge to the ignorant, to make the blind to see, the deaf to hear, and restore the dead to life.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 253)

The purpose of teaching is not complete when a person declares that he has accepted Baha’u’llah as the Manifestation of God for this age; the purpose of teaching is to attract human beings to the divine Message and so imbue them with its spirit that they will dedicate themselves to its service, and this world will become another world and its people another people.
(The Universal House of Justice: Lights of Guidance, p. 595)

Prerequisites:
Whoso ariseth among you to teach the Cause of his Lord, let him, before all else, teach his own self, that his speech may attract the hearts of them that hear him. Unless he teacheth his own self, the words of his mouth will not influence the heart of the seeker.
(Baha’u’llah: Gleanings, p. 277)

First and foremost, one should use every possible means to purge one’s heart and motives, otherwise, engaging in any form of enterprise would be futile. It is also essential to abstain from hypocrisy and blind imitation, inasmuch as their foul odour is soon detected by every man of understanding and wisdom.
(Shoghi Effendi: Guidelines for Teaching, p. 301)

Divine Assistance:
Whoso openeth his lips in this Day and maketh mention of the name of his Lord, the hosts of Divine inspiration shall descend upon him from the heaven of My name, the All-Knowing, the All-Wise. On him shall also descend the Concourse on high, each bearing aloft a chalice of pure light.
(Baha’u’llah: Gleanings, p. 280)

They that have forsaken their country for the purpose of teaching Our Cause – these shall the Faithful Spirit strengthen through its power. A company of Our chosen angels shall go forth with them, as bidden by Him Who is the Almighty, the All-Wise. How great the blessedness that awaiteth him that hath attained the honor of serving the Almighty! By My life! No act, however great, can compare with it, except such deeds as have been ordained by God, the All-Powerful, the Most Mighty. Such a service is, indeed, the prince of all goodly deeds, and the ornament of every goodly act. Thus hath it been ordained by Him Who is the Sovereign Revealer, the Ancient of Days.
Whoso ariseth to teach Our Cause must needs detach himself from all earthly things, and regard, at all times, the triumph of Our Faith as his supreme objective. This hath, verily, been decreed in the Guarded Tablet. And when he determineth to leave his home, for the sake of the Cause of his Lord, let him put his whole trust in God, as the best provision for his journey, and array himself with the robe of virtue. Thus hath it been decreed by God, the Almighty, the All-Praised.
If he be kindled with the fire of His love, if he forgoeth all created things, the words he uttereth shall set on fire them that hear him.
(Baha’u’llah: Gleanings, pp. 334-335)

Rest you assured that the breathing of the Holy Spirit will loosen your tongue. Speak, therefore; speak out with great courage at every meeting. When you are about to begin your address, turn first to Baha’u’llah and ask for the confirmations of the Holy Spirit, then open your lips and say whatever is suggested to your heart; this, however, with the utmost courage, dignity and conviction.
(`Abdu’l-Baha: The Nineteen Day Feast, p. 429)

Guidelines for Teaching:
Proclaim the Cause of thy Lord unto all who are in the heavens and on the earth. Should any man respond to thy call, lay bare before him the pearls of the wisdom of the Lord, thy God, which His Spirit hath sent down upon thee, and be thou of them that truly believe. And should anyone reject thy offer, turn thou away from him, and put thy trust and confidence in the Lord of all worlds.
(Baha’u’llah, quoted in Shoghi Effendi: The Advent of Divine Justice, p. 61)

Be unrestrained as the wind, while carrying the Message of Him Who hath caused the Dawn of Divine Guidance to break. Consider, how the wind, faithful to that which God hath ordained, bloweth upon all the regions of the earth, be they inhabited or desolate. Neither the sight of desolation, nor the evidences of prosperity, can either pain or please it. It bloweth in every direction, as bidden by its Creator. So should be every one that claimeth to be a lover of the one true God. It behoveth him to fix his gaze upon the fundamentals of His Faith, and to labor diligently for its propagation. Wholly for the sake of God he should proclaim His Message, and with that same spirit accept whatever response his words may evoke in his hearer.
(Baha’u’llah: Gleanings, p. 339)

Consort with all men, O people of Baha, in a spirit of friendliness and fellowship. If ye be aware of a certain truth, if ye possess a jewel, of which others are deprived, share it with them in a language of utmost kindliness and good-will. If it be accepted, if it fulfil its purpose, your object is attained. If any one should refuse it, leave him unto himself, and beseech God to guide him. Beware lest ye deal unkindly with him. A kindly tongue is the lodestone of the hearts of men. It is the bread of the spirit, it clotheth the words with meaning, it is the fountain of the light of wisdom and understanding….
(Baha’u’llah: Gleanings, p. 289)

Arise thou to serve the Cause of thy Lord; then give the people the joyful tidings concerning this resplendent Light whose revelation hath been announced by God through His Prophets and Messengers. Admonish everyone moreover to observe prudence as ordained by Him, and in the Name of God advise them, saying: It behoveth every one in this Day of God to dedicate himself to the teaching of the Cause with utmost prudence and steadfastness. Should he discover a pure soil, let him sow the seed of the Word of God, otherwise it would be preferable to observe silence.
(Baha’u’llah: Tablets of Baha’u’llah, p. 242)

Under all conditions the Message must be delivered, but with wisdom. If it be not possible openly, it must be done quietly. The friends should be engaged in educating the souls and should become instruments in aiding the world of humanity to acquire spiritual joy and fragrance. For example: If every one of the friends (believers) were to establish relations of friendship and right dealings with one of the negligent souls, associate and live with him with perfect kindliness, and meanwhile through good conduct and moral behaviour lead him to divine instruction, to heavenly advice and teachings, surely he would gradually arouse that negligent person and would change his ignorance into knowledge.
Souls are liable to estrangement. Such methods should be adopted that the estrangement should be first removed, then the Word will have effect.
If one of the believers be kind to one of the negligent ones and with perfect love should gradually make him understand the reality of the Cause of God in such a way that the latter should know in what manner the Religion of God hath been founded and what its object is, doubtless he will become changed; excepting abnormal souls who are reduced to the state of ashes and whose hearts are like stones, yea, even harder.
(`Abdu’l-Baha: Guidelines for Teaching, pp. 297-298)

In accordance with the divine teachings in this glorious dispensation we should not belittle anyone and call him ignorant, saying: `You know not, but I know’. Rather, we should look upon others with respect, and when attempting to explain and demonstrate, we should speak as if we are investigating the truth, saying: `Here these things are before us. Let us investigate to determine where and in what form the truth can be found.’ The teacher should not consider himself as learned and others ignorant. Such a thought breedeth pride, and pride is not conducive to influence. The teacher should not see in himself any superiority; he should speak with the utmost kindliness, lowliness and humility, for such speech exerteth influence and educateth the souls.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 30)

Necessarily there will be some who are defective amongst men, but it is our duty to enable them by kind methods of guidance and teaching to become perfected. Some will be found who are morally sick; they should be treated in order that they may be healed. Others are immature and like children; they must be trained and educated so that they may become wise and mature. Those who are asleep must be awakened; the indifferent must become mindful and attentive. But all this must be accomplished in the spirit of kindness and love and not by strife, antagonism nor in a spirit of hostility and hatred, for this is contrary to the good pleasure of God. That which is acceptable in the sight of God is love. Love is, in reality, the first effulgence of Divinity and the greatest splendor of God.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 397)

Follow thou the way of thy Lord, and say not that which the ears cannot bear to hear, for such speech is like luscious food given to small children. However palatable, rare and rich the food may be, it cannot be assimilated by the digestive organs of a suckling child. Therefore unto every one who hath a right, let his settled measure be given.
`Not everything that a man knoweth can be disclosed, nor can everything that he can disclose be regarded as timely, nor can every timely utterance be considered as suited to the capacity of those who hear it.’ Such is the consummate wisdom to be observed in thy pursuits. Be not oblivious thereof, if thou wishest to be a man of action under all conditions. First diagnose the disease and identify the malady, then prescribe the remedy, for such is the perfect method of the skilful physician.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, pp. 268-269)

The Power of Words:
Every word is endowed with a spirit, therefore the speaker or expounder should carefully deliver his words at the appropriate time and place, for the impression which each word maketh is clearly evident and perceptible. The Great Being saith: One word may be likened unto fire, another unto light, and the influence which both exert is manifest in the world. Therefore an enlightened man of wisdom should primarily speak with words as mild as milk, that the children of men may be nurtured and edified thereby and may attain the ultimate goal of human existence which is the station of true understanding and nobility. And likewise He saith: One word is like unto springtime causing the tender saplings of the rose-garden of knowledge to become verdant and flourishing, while another word is even as a deadly poison. It behoveth a prudent man of wisdom to speak with utmost leniency and forbearance so that the sweetness of his words may induce everyone to attain that which befitteth man’s station.
(Baha’u’llah: Tablets of Baha’u’llah, pp. 172-173)

Human utterance is an essence which aspireth to exert its influence and needeth moderation. As to its influence, this is conditional upon refinement, which in turn is dependent upon hearts which are detached and pure. As to its moderation, this hath to be combined with tact and wisdom as prescribed in the Holy Scriptures and Tablets.
O My Name! Utterance must needs possess penetrating power. For if bereft of this quality it would fail to exert influence. And this penetrating influence dependeth on the spirit being pure and the heart stainless. Likewise it needeth moderation, without which the hearer would be unable to bear it, rather he would manifest opposition from the very outset. And moderation will be obtained by blending utterance with the tokens of divine wisdom which are recorded in the sacred Books and Tablets. Thus when the essence of one’s utterance is endowed with these two requisites it will prove highly effective and will be the prime factor in transforming the souls of men.
(Baha’u’llah: Tablets of Baha’u’llah, pp. 198-199)

Teaching by Example:
You must all be so ablaze in this day with the fire of the love of God that the heat thereof may be manifest in all your veins, your limbs and members of your body, and the peoples of the world may be ignited by this heat and turn to the horizon of the Beloved.
(Baha’u’llah: Guidelines for Teaching, p. 293)

Do not busy yourselves in your own concerns; let your thoughts be fixed upon that which will rehabilitate the fortunes of mankind and sanctify the hearts and souls of men. This can best be achieved through pure and holy deeds, through a virtuous life and a goodly behavior. Valiant acts will ensure the triumph of this Cause, and a saintly character will reinforce its power.
(Baha’u’llah: Gleanings, pp. 93-94)

What is needed to achieve success in the teaching field is a complete dedication on the part of the individual, consecration to the glorious task of spreading the Faith, and the living of the Baha’i life, because that creates the magnet for the Holy Spirit, and it is the Holy Spirit which quickens the new soul. Thus the individual should be as a reed, through which the Holy Spirit may flow, to give new life to the seeking soul.
(Shoghi Effendi: Guidelines for Teaching, p. 318)