New International Version
We write this to make our joy complete.

American Standard Version
and these things we write, that our joy may be made full.

Berean Study Bible
We write these things so that our joy may be complete.

Douay-Rheims Bible
And these things we write to you, that you may rejoice, and your joy may be full.

English Revised Version
and these things we write, that our joy may be fulfilled.

King James Bible
And these things write we unto you, that your joy may be full.

World English Bible
And we write these things to you, that our joy may be fulfilled.

Young's Literal Translation
and these things we write to you, that your joy may be full.

1 John 1:4 Additional Translations ...