Origin of Satan: How could the angels have sinned if they were in heaven? Is there sin in heaven? [Isaiah 14:12, Ezekiel 28:12-17, Luke 10:18, John 12:31, John 8:44, I John 3:8]. Satan in Heaven: Didn't Satan have access to heaven because he was walking to and fro in Job? Then, was he not cast out of heaven? [Job 1:7, Job 2:2, Revelation 12:7-10].