en_tn_condensed/1jn/03/06.md

remains in him

"continues to have fellowship with him" or "stays joined with him" See how you translated "remains in God" in 1 John 2:6.

No one ... has seen him or known him

John uses the words "seen" and "known" to say that the person who sins has never met Christ in a spiritual sense. "No one ... has ever truly believed in him"