In Matthew 12 we see three different instances where the Pharisees tried to find fault in Jesus and in his disciples. The last instance they accused him of casting out demons by the authority and power of Beelzebub. In other words, they were saying, “Satan is behind the words and power of Jesus.” Jesus then begins (v25f) to prove why it is that he cannot be casting out demons by the power of a demon. Starting in verse 33 we read, “Either make the tree good and its fruit good, or else make the tree bad and its fruit bad; for a tree is known by its fruit.” We should not expect good things to come from someone who does not practice good. For example, we would not want to encourage a habitual traffic offender to become a driving instructor. A tree is known by its fruit.