And (kai). Mutual fellowship depends on mutual knowledge (Westcott). Message (aggelia). Old word (from aggelo, messenger), in N.T. only here and John 3:11 , and note ap autou (from God like apaggellw in verse John 3 ) and anaggellomen, to announce, to disclose, here as in John 4:25 . God is light (o qeo pw estin). Precisely so the Logo is light ( John 1:4-9 ) and what Jesus claimed to be ( John 8:12 ). John repeats it in negative form as he often does ( John 1:3 ).