"The fundamental purpose animating the Faith of God and His Religion is to safeguard the interests and promote the unity of the human race..."

Shrine of the Báb

"The Great Being saith: O ye children of men! The fundamental purpose animating the Faith of God and His Religion is to safeguard the interests and promote the unity of the human race, and to foster the spirit of love and fellowship amongst men. Suffer it not to become a source of dissension and discord, of hate and enmity."

Bahá’u’lláh, Gleanings
www.bahai.org/r/384112768

"I created thee rich, why dost thou bring thyself down to poverty?"

‘Akká

"O Son of Spirit!

I created thee rich, why dost thou bring thyself down to poverty? Noble I made thee, wherewith dost thou
abase thyself? Out of the essence of knowledge I gave thee being, why seekest thou enlightenment from anyone beside Me? Out of the clay of love I molded thee, how dost thou busy thyself with another? Turn thy sight unto thyself, that thou mayest find Me standing within thee, mighty, powerful and self-subsisting."

Bahá’u’lláh, The Hidden Words
www.bahai.org/r/511421653 

"The best beloved of all things in My sight is Justice..."

Shrine of Bahá’u’lláh

"O Son of Spirit!

The best beloved of all things in My sight is Justice; turn not away therefrom if thou desirest Me, and neglect it not that I may confide in thee. By its aid thou shalt see with thine own eyes and not through the eyes of others, and shalt know of thine own knowledge and not through the knowledge of thy neighbor. Ponder this in thy heart; how it behooveth thee to be. Verily justice is My gift to thee and the sign of My loving-kindness. Set it then before thine eyes."

Bahá’u’lláh, The Hidden Words
www.bahai.org/r/099947277

"Deal ye one with another with the utmost love and harmony, with friendliness and fellowship."

Shrine of Bahá’u’lláh and Mansion of Bahjí

"The utterance of God is a lamp, whose light is these words: Ye are the fruits of one tree, and the leaves of one branch. Deal ye one with another with the utmost love and harmony, with friendliness and fellowship. He Who is the Daystar of Truth beareth Me witness! So powerful is the light of unity that it can illuminate the whole earth. The one true God, He Who knoweth all things, Himself testifieth to the truth of these words."

Bahá’u’lláh, Gleanings
www.bahai.org/r/487380847 

“The earth is but one country, and mankind its citizens.”

“It is not for him to pride himself who loveth his own country, but rather for him who loveth the whole world. The earth is but one country, and mankind its citizens.” And again, “That one indeed is a man who today dedicateth himself to the service of the entire human race.”

Bahá’u’lláh, The World Order of Bahá’u’lláh
www.bahai.org/r/391200266

An Introduction to the life of Bahá'u'lláh
https://www.bahai.org/bahaullah/