1 John 1:3

ὃ ἐωρ. καὶ ἀκ., not merely a resumption but a reiteration of the protasis. καὶ ὑμεῖς, “ye also” who have not seen Jesus. κοινωνίαν, not merely knowledge through hearsay of what the Apostles had known as eye-witnesses, but personal and direct communion with the living Lord. This St. John proceeds to make plain. The phrase καὶ … δὲ, et … vero, atque etiam, introduces an important addition or explanation (cf. John 6:51; John 8:16-17; John 15:27; Acts 22:29; Hebrews 9:21; 2 Peter 1:5). “Christ walks no longer in the flesh among us, but He appears still continually to the world of men and reveals Himself to those who love Him. Through faith a real personal contact with the Christ now glorified in the Spirit is possible” (Rothe). There is a gracious constraint on all who know this blessed fellowship to bring others into it. Cf. 1 Corinthians 9:16. Bunyan, preface to The Jerusalem-Sinner Saved : “I have been vile myself, but have obtained mercy, and I would have my companions in sin partake of mercy too, and therefore I have writ this little book”.