"The holy Manifestations of God were sent down to make visible the oneness of humanity. "

"Until such time, however, as the friends establish perfect unity among themselves, how can they summon others to harmony and peace? 

That soul which hath itself not come alive,
Can it then hope another to revive? Reflect ye as to other than human forms of life and be ye admonished thereby: those clouds that drift apart cannot produce the bounty of the rain, and are soon lost; a flock of sheep, once scattered, falleth prey to the wolf, and birds that fly alone will be caught fast in the claws of the hawk. What greater demonstration could there be that unity leadeth to flourishing life, while dissension and withdrawing from the others, will lead only to misery; for these are the sure ways to bitter disappointment and ruin.

The holy Manifestations of God were sent down to make visible the oneness of humanity. For this did They endure unnumbered ills and tribulations, that a community from amongst mankind’s divergent peoples could gather within the shadow of the Word of God and live as one, and could, with delight and grace, demonstrate on earth the unity of humankind. Therefore must the desire of the friends be this, to bring together and unify all peoples, that all may receive a generous drink of this pure wine from this cup that is ‘tempered at the camphor fountain.’ 1 Let them make the differing populations to be as one and induce the hostile and murderous kindreds of the earth to love one another instead. Let them loose from their shackles the captives of sensual desires and cause the excluded to become intimates of the mysteries. Let them give to the bereft a share of the blessings of these days; let them guide the portionless to inexhaustible treasure. This grace can come about through words and ways and deeds that are of the Unseen Kingdom but, lacking such, it can never be."

`Abdu'l-Bahá, Selections From the Writings of ‘Abdu’l-Bahá, pp. 277-278

1. Qur’án 76:5

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"O SON OF SPIRIT!
My claim on thee is great, it cannot be forgotten. My grace to thee is plenteous, it cannot be veiled. My love has made in thee its home, it cannot be concealed. My light is manifest to thee, it cannot be obscured."

- Bahá'u'lláh, The Hidden Words of Bahá’u’lláh, Arabic #20