en_tn_lite_do_not_use/1jn/01/03.md

General Information:

Here the words "we," "us," and "our" refer to John and those who had been with Jesus. (See: rc://en/ta/man/jit/figs-exclusive)

That which we have seen and heard we declare also to you

"We say to you also what we have seen and heard"

have fellowship with us. Our fellowship is with the Father

"be our close friends. We are friends with God the Father"

Our fellowship

It is not clear if John is including or excluding his readers. You may translate this either way.

Father ... Son

These are important titles that describe the relationship between God and Jesus. (See: rc://en/ta/man/jit/guidelines-sonofgodprinciples)