"The abundance of the heart" for good or evil

How can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks. (Matthew 12:34) There were people who had seen Jesus heal a man who was blind and mute, and saw that Jesus had driven out a demon from the man. So Jesus' opponents accused that he was demonic, to explain why he had power over the demons. Did they believe themselves and their accusations? Only God…