'Seen' in the Bible

What was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and touched with our hands, concerning the Word of Life—

and the life was manifested, and we have seen and testify and proclaim to you the eternal life, which was with the Father and was manifested to us—

what we have seen and heard we proclaim to you also, so that you too may have fellowship with us; and indeed our fellowship is with the Father, and with His Son Jesus Christ.

No one who abides in Him sins; no one who sins has seen Him or knows Him.

If someone says, “I love God,” and hates his brother, he is a liar; for the one who does not love his brother whom he has seen, cannot love God whom he has not seen.