Maybe that's the reason," Adam said slowly, feeling his way. "Maybe if I had loved him I would have been jealous of him. You were. Maybe-maybe love makes you suspicious and doubting. Is it true that when you love a woman you are never sure-never sure of her because you aren't sure of yourself? I can see it pretty clearly. I can see how you loved him and what it did to you. I did not love him. Maybe he loved me. He tested me and hurt me and punished me and finally he sent me out like a sacrifice, maybe to make up for something. But he did not love you, and so he had faith in you. Maybe — why, maybe it's a kind of reverse.

East of Eden (1952)