en_tn/1jn/02/04.md

The one who says

"Anyone who says" or "The person who says"

I know God

"I have a good relationship with God"

does not keep

"does not obey" or "disobeys"

his commandments

"what God tells him to do"

the truth is not in him

The truth is spoken of as if it were an object that could be inside the believers. Alternate translation: "he does not believe what God says is true" (See: rc://en/ta/man/translate/figs-metaphor)