Message 8, Cosmic Treason:

Man did not remain in the state of righteousness in which he was created. He sinned against God and fell, becoming dead in sin and defiled in every faculty of soul and body. Most people today deny this fact, believing that man is by nature good. R.C. Sproul looks at how it is incumbent upon faithful Christian leaders therefore to teach the truth about the Fall and about the true nature and evil of sin.