Luke 23:34 "Then said Jesus, Father, forgive them; for they know not what they do."
"Sin is always sin in the sight of God whether we are conscious of it or not. Sins of ignorance need atonement just as truly as do conscious sins. God is holy, and he will not lower his standard of righteousness to the level of our ignorance. Ignorance is not innocence. As a matter of fact, ignorance is more culpable now than it was in the days of Moses. We have no excuse for our ignorance. God has clearly and fully revealed his will. The Bible is in our hands, and we cannot plead ignorance of its contents except to condemn our laziness. God has spoken and by his word we shall be judged.
And yet the fact remains that we are ignorant of many things, and the fault and blame are ours. And this does not minimize the enormity of our guilt. Sins of ignorance need the divine forgiveness as our Lord’s prayer here plainly shows. Learn then how high is God’s standard, how great is our need, and praise him for an atonement of infinite sufficiency, which cleanseth from all sin." —A. W. Pink (1886–1952)