Does all evil come from Satan?

Evil is something that was created by Satan (AKA the Devil). God gave us free will, to do whatever we wanted, but Satan tricked the first Man and Woman, Adam and Eve, into doing wrong, which is what God tells us NOT to do.

After Adam and Eve did wrong by eating from the Tree of the Knowledge of Good and Evil, it was like an addiction-They did wrong, and so now it is a learned trait that they have in them to do wrong. However, with us, we INHERITED that trait from them, and so WE do evil things also.

Evil comes from the spirit of a person

People, always people.