'Ignorance' in the Bible

And now, brethren, I know that in ignorance ye did it, as did also your rulers.

For as I passed along, and observed the objects of your worship, I found also an altar with this inscription, TO AN UNKNOWN GOD. What therefore ye worship in ignorance, this I set forth unto you.

The times of ignorance therefore God overlooked; but now he commandeth men that they should all everywhere repent: