1 John 5:11-13

And this is that testimony (that evidence): God gave us eternal life, and this life is in His Son. He who possesses the Son has that life; he who does not possess the Son of God does not have that life. I write this to you who believe in (adhere to, trust in, and rely on) the name of the Son of God [in the peculiar services and blessings conferred by Him on men], so that you may know [with settled and absolute knowledge] that you [already] have life, yes, eternal life.