On another Sabbath, he entered the synagogue and was teaching, and a man was there whose right hand was withered. And the scribes and the Pharisees watched him, to see whether he would heal on the Sabbath, so that they might find a reason to accuse him. But he knew their thoughts, and he said to the man with the withered hand, “Come and stand here.” And he rose and stood there. And Jesus said to them, “I ask you, is it lawful on the Sabbath to do good or to do harm, to save life or to destroy it?” And after looking around at them all he said to him, “Stretch out your hand.” And he did so, and his hand was restored. But they were filled with fury and discussed with one another what they might do to Jesus. Luke 6:6-11.
The Pharisees knew He had the power to heal, and they wanted to accuse Him anyway. They were so convinced that they were right, and He was wrong, that the power of God was irrelevant. Then, when Jesus healed someone in front of them, they were angry at being humiliated by His power.
Evidence does not produce faith. It is the other way around. “And without faith it is impossible to please him, for whoever would draw near to God must believe that he exists and that he rewards those who seek him.” (Hebrews 11:6). First comes faith, then the reward. God is always proving Himself to those who believe in Him. He does not produce results on demand. “This generation is an evil generation. It seeks for a sign, but no sign will be given to it except the sign of Jonah.” (Luke 11:29). When a sign was demanded, He just gave them a scripture reference.
In order to believe Jesus, the Pharisees would have to ditch what they already believed. Jesus was a challenge to their dead orthodoxy that didn’t save, heal, or forgive. Jesus challenges all our dead ideologies and our politics and our physical science that exalts itself above the knowledge of God. The Lord of all cannot be weighed, measured, and judged by us. It’s the other way around.