'Ignorant' in the Bible

For I would not have you ignorant, brethren, that all our fathers were under the cloud, and all passed through the sea;

But concerning spiritual manifestations, brethren, I do not wish you to be ignorant.

But if any be ignorant, let him be ignorant.

Awake up righteously, and sin not; for some are ignorant of God: I speak to you as a matter of shame.