John 17:3

John 17:3. And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.

Do you know God? Do you know Jesus Christ? Are you on speaking terms, on loving terms, with them? Are they your friends? Then, you have eternal life; for "this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent."