Since the devil tries to imitate God, he has his own gospel:
Question God’s Word (Yea, hath God said?)
Genesis 3:1 (KJV) Now the serpent was more subtle than any beast of the field which the LORD God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?
Sin isn’t that bad
Genesis 3:5 (KJV) For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.
You can get away with it
Genesis 3:4 (KJV) And the serpent said unto the woman, Ye shall not surely die:
Have you believed the devil’s gospel?