Hey there!
Have you ever read The Odyssey? This guy named Odysseus is trying to get home but this God of the Sea Poseidon keeps getting in his way. Odysseus tries and tries to please Poseidon, but Poseidon doesn't listen to whatever he does. Now, you may not believe in this God, Poseidon, but let me tell you, the Greeks wrote it down and it was recorded, just as other stories about other men and women who tangled with these Gods were recorded.
If the Odyssey is not enough proof for you that Poseidon, Zeus, Hades, Hera, Athena, and Apollo (not to mention a few others) and The Iliad is not enough proof and Ovid's Metamorphosis is not enough for proof for you, then I'm afraid you cannot be convinced. YOu should try to open your heart as the decision is yours to make! IF you do not measure up to their standards of goodness, then you will be tortured for all eternity. Just look at Prometheus! His liver gets pecked at by a bird once a day, then it regenerates and the bird comes back the next day! So listen up! Your liver is hoping that you choose wisely!