'Ignorance' in the Bible

"And now, brothers, I know that you acted in ignorance like your leaders.

Though God has overlooked those times of ignorance, he now commands everyone everywhere to repent,

They are darkened in their understanding and separated from the life of God because of their ignorance and hardness of heart.

But only the high priest went into the second part, and then only once a year, and never without blood, which he offered for himself and for the sins committed by the people in ignorance.