Is any man able perfectly to keep the commandments of God? – Shorter Westminster Catechism

No mere man, since the fall, is able in this life perfectly to keep the commandments of God, but doth daily break them in thought, word, and deed.

Shorter Westminster Catechism

What is forbidden in the tenth commandment? – Shorter Westminster Catechism

Are all transgressions of the law equally heinous? – Shorter Westminster Catechism