Pharisees (said to themselves): He has Beelzebub, and by the prince of the devils he casts out devils.
Jesus knew the thoughts of the Pharisees.
Jesus: Every kingdom divided against itself is brought to desolation. Every city or house divided against itself shall not stand. If Satan casts out Satan, he is divided against himself. How then shall then his kingdom stand? (Matthew 12:25-26 is restated in Mark 3:23-26) If I by Beelzebub cast out devils, by whom do your children cast them out? Therefore they shall be your judges. But if I cast out devils by the Spirit of God, then the kingdom of God is come to you.