1 John 2:21
I do not write to you because you do not know it, but because you do know it.
2 Peter 1:12
Therefore, I will always remind you of these things, although you know them and are firmly grounded in the truth that you already have.
Romans 15:14-15
As far as I am concerned about you, my brothers, I am convinced that you especially are abounding in the highest goodness, richly supplied with perfect knowledge and competent to counsel one another.
Jude 1:5
Now I want to remind you, though you know it all already, that although the Lord had saved a people out of the land of Egypt, He afterward destroyed those who did not believe.
Treasury of Scripture Knowledge
Summary
I have not written unto you because ye know not the truth, but because ye know it, and that no lie is of the truth.
Because ye know not
General references
Bible References
Because ye know not
Romans 15:14
As far as I am concerned about you, my brothers, I am convinced that you especially are abounding in the highest goodness, richly supplied with perfect knowledge and competent to counsel one another.
2 Peter 1:12
Therefore, I will always remind you of these things, although you know them and are firmly grounded in the truth that you already have.
General references
John 10:5
But they will never come on behind a stranger, but will run away from him, because they do not know the voice of strangers."