After the fall into sin, no one is able to fulfill God’s Law in a manner acceptable to God. Unbelievers do not fulfill it at all, and even the obedience of believers in Christ is sadly deficient. Christ alone has fulfilled God’s Law.
Rom. 3:23: All have sinned and come short of the glory of God.
Is. 64:6: We are all as an unclean thing, and all our righteousnesses are as filthy rags.
Ps. 143:2: Enter not into judgment with thy servant, for in they sight shall no man living be justified.