'Ignorant' in the Bible

and these, as irrational natural beasts, made to be caught and destroyed -- in what things they are ignorant of, speaking evil -- in their destruction shall be destroyed,

For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:

But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.

He speaks about this subject in all his letters. Some things in them are hard to understand, which ignorant and unstable people distort, leading to their own destruction, as they do the rest of the Scriptures.