New Living Translation
So I am writing to you not because you don’t know the truth but because you know the difference between truth and lies.

American Standard Version
I have not written unto you because ye know not the truth, but because ye know it, and because no lie is of the truth.

Berean Study Bible
I have not written to you because you lack knowledge of the truth, but because you have it, and because no lie comes from the truth.

Douay-Rheims Bible
I have not written to you as to them that know not the truth, but as to them that know it: and that no lie is of the truth.

English Revised Version
I have not written unto you because ye know not the truth, but because ye know it, and because no lie is of the truth.

King James Bible
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.

World English Bible
I have not written to you because you don't know the truth, but because you know it, and because no lie is of the truth.

Young's Literal Translation
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.

1 John 2:21 Additional Translations ...