What is the eternal life that the righteous enjoy?

The evangelist says, “Beloved, now we are children of God; and it has not yet been revealed what we shall be, but we know that when He is revealed, we shall be like Him, for we shall see Him as He is” (1 John 3:2). And the apostle Paul says, “I know a man in Christ who fourteen years ago—whether in the body I do not know, or whether out of the body I do not know, God knows—such a one was caught up to the third heaven … How he was caught up into Paradise and heard inexpressible words, which it is not lawful for a man to utter” (2 Cor. 12:2–4).