He founded the oneness of the world of humanity. He declared that all humanity is the servant of God, and that God is kind to all, that He created all and provides for all; that He nurtures all; therefore why should we be unkind? Inasmuch as God is kind and merciful to all His creatures and manifests His care and goodwill to them in every way, why should we show forth that which is contrary? Inasmuch as God loves all, why should we entertain animosity or envy? For if God did not love all, He would not have provided for all; He would not have created man; He would not have trained him. Now that He has created, provided for all and preserved man, it is therefore evident that God is kind to all. Why then should man be unkind to man?
(Bahá’í Scriptures, p. 315)