Baptist Catechism Q 87-88

Q 87. Is. any man able perfectly to keep the commandments of God?
A. No mere man since the fall is able in this life perfectly to keep the commandments of God (Ecc. 7:20; 1 John 1:8, 10; Gal. 5:17), but doth daily break them in thought, word, or deed (Gn 4:5, and 7:21; Rom. 3:9-21; James 3:2-13).

Q 88. Are all transgressions of the law equally heinous?
A. Some sins in themselves, and by reason of several aggravations, are more heinous in the sight of God than others (Ez. 8:6, 13, 15; 1 Jn. 5:16; Ps. 78:17, 32, 56).