John MacArthur, Matthew 1-7, Moody, 1985, p. 447.
Man’s basic problem is preoccupation with self. He is innately beset with narcissism, a condition named after the Greek mythological character Narcissus, who spent his life admiring his reflection in a pool of water. In the final analysis, every sin results from preoccupation with self. We sin because we are totally selfish, totally devoted to ourselves, rather than to God and to others.
John MacArthur, Matthew 1-7, Moody, 1985, p. 447.