"Be fair to yourselves and to others, that the evidences of justice may be revealed, through your deeds, among Our faithful servants."

"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. Take heed, O people, lest ye be of them that give good counsel to others but forget to follow it themselves. The words of such as these, and beyond the words the realities of all things, and beyond these realities the angels that are nigh unto God, bring against them the accusation of falsehood. 

Should such a man ever succeed in influencing anyone, this success should be attributed not to him, but rather to the influence of the words of God, as decreed by Him Who is the Almighty, the All-Wise. In the sight of God he is regarded as a lamp that imparteth its light, and yet is all the while being consumed within itself. 

Say: Commit not, O people, that which will bring shame upon you or dishonor the Cause of God in the eyes of men, and be not of the mischief-makers. Approach not the things which your minds condemn. Eschew all manner of wickedness, for such things are forbidden unto you in the Book which none touch except such as God hath cleansed from every taint of guilt, and numbered among the purified. 

Be fair to yourselves and to others, that the evidences of justice may be revealed, through your deeds, among Our faithful servants. Beware lest ye encroach upon the substance of your neighbor. Prove yourselves worthy of his trust and confidence in you, and withhold not from the poor the gifts which the grace of God hath bestowed upon you. He, verily, shall recompense the charitable, and doubly repay them for what they have bestowed. No God is there but Him. All creation and its empire are His. He bestoweth His gifts on whom He will, and from whom He will He withholdeth them. He is the Great Giver, the Most Generous, the Benevolent. 

Say: Teach ye the Cause of God, O people of Bahá, 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. Thus hath His ordinance been sent down from the Kingdom of Him Who is the Most Exalted, the All-Wise. Beware lest ye contend with anyone, nay, strive to make him aware of the truth with kindly manner and most convincing exhortation. If your hearer respond, he will have responded to his own behoof, and if not, turn ye away from him, and set your faces towards God’s sacred Court, the seat of resplendent holiness." 

~ Bahá’u’lláh

(Gleanings from the Writings of Bahá’u’lláh)