New International Version
This is how we know that we belong to the truth and how we set our hearts at rest in his presence:

American Standard Version
Hereby shall we know that we are of the truth, and shall assure our heart before him:

Berean Study Bible
And by this we will know that we belong to the truth, and will assure our hearts in His presence:

Douay-Rheims Bible
In this we know that we are of the truth: and in his sight shall persuade our hearts.

English Revised Version
Hereby shall we know that we are of the truth, and shall assure our heart before him,

King James Bible
And hereby we know that we are of the truth, and shall assure our hearts before him.

World English Bible
And by this we know that we are of the truth, and persuade our hearts before him,

Young's Literal Translation
and in this we know that of the truth we are, and before Him we shall assure our hearts,

1 John 3:19 Additional Translations ...