John MacArthur on Sin, Satan, and Conscience

“[Satan] wants us to laugh at sin rather than mourn over it, and to rationalize it rather than confess it and bring it to the Lord for forgiveness. He seduces us to become so used to sin in us and around us that it no longer bothers our conscience.”

John MacArthur
Ephesians, Moody, 1986, p. 351.