Cross reference
1 John 2:21
21 I did not write to you because ye have not known the truth, but because ye have known it, and because no lie is of the truth.
2 Peter 1:12
12 Wherefore, I will not be careless always to remind you concerning these things, though, having known them, and having been established in the present truth,
Proverbs 9:8-9
8 Reprove not a scorner, lest he hate thee, Give reproof to the wise, and he loveth thee.
9 Give to the wise, and he is wiser still, Make known to the righteous, And he increaseth learning.
Jude 1:5
5 and to remind you I intend, you knowing once this, that the Lord, a people out of the land of Egypt having saved, again those who did not believe did destroy;
Proverbs 1:5
5 (The wise doth hear and increaseth learning, And the intelligent doth obtain counsels.)
Romans 15:14-15
14 And I am persuaded, my brethren -- I myself also -- concerning you, that ye yourselves also are full of goodness, having been filled with all knowledge, able also one another to admonish;
15 and the more boldly I did write to you, brethren, in part, as putting you in mind, because of the grace that is given to me by God,