WCF 13.2.
This sanctification is throughout, in the whole man; (1 Thess. 5:23) yet imperfect in this life, there abiding still some remnants of corruption in every part; (1 John 1:10, Rom. 7:18, 23, Phil. 3:12) whence ariseth a continual and irreconcilable war, the flesh lusting against the Spirit, and the Spirit against the flesh. (Gal. 5:17, 1 Pet. 2:11)