From the Writings of Baha’u’llah:
The essence of faith is fewness of words and abundance of deeds;…
(Baha’u’llah: Tablets of Baha’u’llah, p. 156)

Guidance hath ever been given by words, and now it is given by deeds. Every one must show forth deeds that are pure and holy, for words are the property of all alike, whereas such deeds as these belong only to Our loved ones. Strive then with heart and soul to distinguish yourselves by your deeds.
(Baha’u’llah: Persian Hidden Words, p. 76)

Beware, O people of Baha, lest ye walk in the ways of them whose words differ from their deeds. Strive that ye may be enabled to manifest to the peoples of the earth the signs of God, and to mirror forth His commandments. Let your acts be a guide unto all mankind, for the professions of most men, be they high or low, differ from their conduct. It is through your deeds that ye can distinguish yourselves from others. Through them the brightness of your light can be shed upon the whole earth.
(Baha’u’llah: Gleanings, p. 305)

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.
(Baha’u’llah: Gleanings, pp. 93-94)

We ask God graciously to grant that all may evince such fairness of character, such goodliness of deed and kindliness of word as will meet with His good pleasure. It hath been decreed that the citadels of men’s hearts should be subdued through the hosts of a noble character and praiseworthy deeds.
(Baha’u’llah: Trustworthiness, p. 331)

From the Writings and Utterances of `Abdu’l-Baha:
Man reacheth perfection through good deeds, voluntarily performed, not through good deeds the doing of which was forced upon him.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 115)

Act ye in such wise, showing forth pure and goodly deeds, and modesty and humility, that ye will cause others to be awakened.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 203)

If we are true Baha’is speech is not needed. Our actions will help on the world, will spread civilization, will help the progress of science, and cause the arts to develop. Without action nothing in the material world can be accomplished, neither can words unaided advance a man in the spiritual Kingdom. It is not through lip-service only that the elect of God have attained to holiness, but by patient lives of active service they have brought light into the world.
Therefore strive that your actions day by day may be beautiful prayers. Turn towards God, and seek always to do that which is right and noble. Enrich the poor, raise the fallen, comfort the sorrowful, bring healing to the sick, reassure the fearful, rescue the oppressed, bring hope to the hopeless, shelter the destitute!
(`Abdu’l-Baha: Paris Talks, pp. 80-81)

Although a person of good deeds is acceptable at the Threshold of the Almighty, yet it is first “to know,” and then “to do.” Although a blind man produceth a most wonderful and exquisite art, yet he is deprived of seeing it. Consider how most animals labor for man, draw loads and facilitate travel; yet, as they are ignorant, they receive no reward for this toil and labor. The cloud raineth, roses and hyacinths grow; the plain and meadow, the garden and trees become green and blossom; yet they do not realize the results and outcome of all these. The lamp is lighted, but as it hath not a conscious knowledge of itself, no one hath become glad because of it. Moreover, a soul of excellent deeds and good manners will undoubtedly advance from whatever horizon he beholdeth the lights radiating. Herein lies the difference: By faith is meant, first, conscious knowledge, and second, the practice of good deeds.
(`Abdu’l-Baha: Baha’i World Faith, pp. 382-383)

There is a cordial thanksgiving, too, which expresses itself in the deeds and actions of man when his heart is filled with gratitude. For example, God has conferred upon man the gift of guidance, and in thankfulness for this great gift certain deeds must emanate from him. To express his gratitude for the favors of God man must show forth praiseworthy actions. In response to these bestowals he must render good deeds, be self-sacrificing, loving the servants of God, forfeiting even life for them, showing kindness to all the creatures. He must be severed from the world, attracted to the Kingdom of Abha, the face radiant, the tongue eloquent, the ear attentive, striving day and night to attain the good pleasure of God. Whatsoever he wishes to do must be in harmony with the good pleasure of God. He must observe and see what is the will of God and act accordingly. There can be no doubt that such commendable deeds are thankfulness for the favors of God.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 236)

Again, is there any deed in the world that would be nobler than service to the common good? Is there any greater blessing conceivable for a man, than that he should become the cause of the education, the development, the prosperity and honor of his fellow-creatures? No, by the Lord God! The highest righteousness of all is for blessed souls to take hold of the hands of the helpless and deliver them out of their ignorance and abasement and poverty, and with pure motives, and only for the sake of God, to arise and energetically devote themselves to the service of the masses, forgetting their own worldly advantage and working only to serve the general good.
(`Abdu’l-Baha: Secret of Divine Civilization, p. 103)

Act in accordance with the counsels of the Lord: that is, rise up in such wise, and with such qualities, as to endow the body of this world with a living soul, and to bring this young child, humanity, to the stage of adulthood. So far as ye are able, ignite a candle of love in every meeting, and with tenderness rejoice and cheer ye every heart. Care for the stranger as for one of your own; show to alien souls the same loving kindness ye bestow upon your faithful friends. Should any come to blows with you, seek to be friends with him; should any stab you to the heart, be ye a healing salve unto his sores; should any taunt and mock at you, meet him with love. Should any heap his blame upon you, praise ye him; should he offer you a deadly poison, give him the choicest honey in exchange; and should he threaten your life, grant him a remedy that will heal him evermore. Should he be pain itself, be ye his medicine; should he be thorns, be ye his roses and sweet herbs. Perchance such ways and words from you will make this darksome world turn bright at last; will make this dusty earth turn heavenly, this devilish prison place become a royal palace of the Lord – so that war and strife will pass and be no more, and love and trust will pitch their tents on the summits of the world. Such is the essence of God’s admonitions; such in sum are the teachings for the Dispensation of Baha.
(`Abdu’l-Baha: Selections … `Abdu’l-Baha, p. 34)

You must manifest complete love and affection toward all mankind. Do not exalt yourselves above others, but consider all as your equals, recognizing them as the servants of one God. Know that God is compassionate toward all; therefore, love all from the depths of your hearts, prefer all religionists before yourselves, be filled with love for every race, and be kind toward the people of all nationalities. Never speak disparagingly of others, but praise without distinction. Pollute not your tongues by speaking evil of another. Recognize your enemies as friends, and consider those who wish you evil as the wishers of good. You must not see evil as evil and then compromise with your opinion, for to treat in a smooth, kindly way one whom you consider evil or an enemy is hypocrisy, and this is not worthy or allowable. You must consider your enemies as your friends, look upon your evil-wishers as your well-wishers and treat them accordingly. Act in such a way that your heart may be free from hatred. Let not your heart be offended with anyone. If some one commits an error and wrong toward you, you must instantly forgive him. Do not complain of others. Refrain from reprimanding them, and if you wish to give admonition or advice, let it be offered in such a way that it will not burden the bearer. Turn all your thoughts toward bringing joy to hearts. Beware! Beware! lest ye offend any heart. Assist the world of humanity as much as possible. Be the source of consolation to every sad one, assist every weak one, be helpful to every indigent one, care for every sick one, be the cause of glorification to every lowly one, and shelter those who are overshadowed by fear.
In brief, let each one of you be as a lamp shining forth with the light of the virtues of the world of humanity. Be trustworthy, sincere, affectionate and replete with chastity. Be illumined, be spiritual, be divine, be glorious, be quickened of God, be a Baha’i.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 453)