...the human heart, as fashioned by God, is one and undivided, it behoveth thee to take heed that its affections be, also, one and undivided. Cleave thou, therefore, with the whole affection of thine heart, unto His love, and withdraw it from the love of anyone besides Him, that He may aid thee to immerse thyself in the ocean of His unity, and enable thee to become a true upholder of His oneness. God is My witness. My sole purpose in revealing to thee these words is to sanctify thee from the transitory things of the earth, and aid thee to enter the realm of everlasting glory, that thou mayest, by the leave of God, be of them that abide and rule therein.
—Bahá’u’lláh, The Summons of the Lord of Hosts
