Basic beliefs of atheism :
An atheist is anyone who doesn't happen to believe in any gods, no matter what their reasons or how they approach the question of whether any gods exist.
-There is no God or devil.
-There is no supernatural realm.
-Miracles cannot occur.
-There is no such thing as sin as a violation of God's will.
-Generally, the universe is materialistic and measurable.
Man is material.
-Generally, evolution is considered a scientific fact.
Ethics and morals are relative.
Basic Beliefs of agnosticism :
An agnostic is anyone who doesn't claim to know for that any gods exist or not, no matter what their reasons or how they approach the question of whether any gods exist.
Agnostic Christian - I don't know, but I believe in Christianity.
Agnostic theist - I don't know, but I believe there's a personal god.
Agnostic deist - I don't know, but I believe there's an impersonal god.
Agnostic atheist - I don't know, but I do not believe, either.
Hope this helps a little .