World Wide Study Bible
a Bible passage
5. in the lust—Greek, "passion"; which implies that such a one is unconsciously the passive slave of lust.
which know not God—and so know no better. Ignorance of true religion is the parent of unchastity (Eph 4:18, 19). A people's morals are like the objects of their worship (De 7:26; Ps 115:8; Ro 1:23, 24).