Who is the Villain?

I have been reading a book called "The Writer's Journey" and in it, the book talks about all the archetypes in a story. One is the villain. Every story tends to have some sort of a villain, whether it be the guy who is trying to take over the world, the man who is trying to steal the hero's girlfriend, or a con-artist. But a question came up. Does the villain see themselves as the villain?

My friend and I had a discussion about it today. Does the villain really see themselves as evil? Do they think what they are doing is wrong or that it is something necessary in order to survive? The dictionary defines evil as morally wrong; injurious, accompanied by misfortune or suffering. Does the villain believe what they are doing is morally wrong? Does everyone believe in the same standards of morals? Did Adam and Eve see themselves as evil when they ate from the tree of life?

So, now I ask you, does the villain see himself as evil?