Westminster Assembly

As for those wicked and ungodly men whom God, as a righteous judge, for former sins, doth blind and harden; from them He not only withholdeth his grace, whereby they might have been enlightened in their understandings, and wrought upon in their hearts; but sometimes also withdraweth the gifts which they had, and exposeth them to such objects as their corruption makes occasions of sin; and withal, gives them over to their own lusts, the temptations of the world, and the power of Satan.

This corruption of nature, during this life, doth remain in those that are regenerated (1 John 1:8, 10; Rom. 7:14, 17–18, 23; James 3:2; Prov. 20:9; Eccl. 7:20); and although it be, through Christ, pardoned and mortified; yet both itself, and all the motions thereof, are truly and properly sin (Rom. 7:5, 7–8, 25; Gal. 5:17).