DID THE DEVIL MAKE ME DO IT ?

Now some say according to the Bible the devil is responsible for humans wrong doing's. They say that he is the one that made Adam and Eve fall from grace. Now my question is, is it  really some outside force or is it something in us that make us do wrong and right? Do we have a little devil in us? Is there really a such thing as good and evil? Do we have an two part nature which is agreeable and disagreeable? Come go family and think hard on this one here. We hope to see hear from you on this one here.