What's it to be a Baha'i

The purpose of religion as revealed from the heaven of God’s holy Will is to establish unity and concord amongst the peoples of the world; make it not the cause of dissension and strife. The religion of God and His divine law are the most potent instruments and the surest of all means for the dawning of the light of unity amongst men. The progress of the world, the development of nations, the tranquility of peoples, and the peace of all who dwell on earth are among the principles and ordinances of God.
- Tablets of Bahá’u’lláh, Ishráqát, Tablets of Bahá’u’lláh Revealed After the Kitáb-i-Aqdas

“Let each morn be better than its eve and each morrow richer than its yesterday. Man's merit lieth in service and virtue and not in the pageantry of wealth and riches. Take heed that your words be purged from idle fancies and worldly desires and your deeds be cleansed from craftiness and suspicion. Dissipate not the wealth of your precious lives in the pursuit of evil and corrupt affection, nor let your endeavours be spent in promoting your personal interest.“
-Bahá’u’lláh — Tablets of Bahá’u’lláh Revealed After the Kitáb-i-Aqdas

“O CHILDREN OF MEN! Know ye not why We created you all from the same dust? That no one should exalt himself over the other. Ponder at all times in your hearts how ye were created. Since We have created you all from one same substance it is incumbent on you to be even as one soul, to walk with the same feet, eat with the same mouth and dwell in the same land, that from your inmost being, by your deeds and actions, the signs of oneness and the essence of detachment may be made manifest. Such is My counsel to you, O concourse of light! Heed ye this counsel that ye may obtain the fruit of holiness from the tree of wondrous glory.”
-Baha’u’llah, The Hiddden Words, From the Arabic #68

God has given us eyes, that we may look about us at the world, and lay hold of whatsoever will further civilization and the arts of living. He has given us ears, that we may hear and profit by the wisdom of scholars and philosophers and arise to promote and practice it. Senses and faculties have been bestowed upon us, to be devoted to the service of the general good; so that we, distinguished above all other forms of life for perceptiveness and reason, should labor at all times and along all lines, whether the occasion be great or small, ordinary or extraordinary, until all mankind are safely gathered into the impregnable stronghold of knowledge. We should continually be establishing new bases for human happiness and creating and promoting new instrumentalities toward this end. How excellent, how honorable is man if he arises to fulfill his responsibilities; how wretched and contemptible, if he shuts his eyes to the welfare of society and wastes his precious life in pursuing his own selfish interests and personal advantages. Supreme happiness is man’s, and he beholds the signs of God in the world and in the human soul, if he urges on the steed of high endeavor in the arena of civilization and justice.
— ‘Abdu’l-Bahá, The Secret of Divine Civilization