Why are the Pharisees asking for a sign from heaven, when Jesus has been healing and raising the dead all this time already? What more are they hoping for? I honestly don't get it, although the words "tempting him" rather than "testing him" is used in this translation. It makes me think of the enemy tempting Jesus in the desert to use his power for his own glory rather than that of the Father. Throughout his ministry, Jesus is moved by compassion. Even after the last group of people he fed tried to kidnap him to force him to be their king, he feeds four thousand more because they haven't eaten in three days and he doesn't want them to faint on the way home. Even now, by NOT giving them a sign, he indicates to the Pharisees that he is not afraid of them. Jesus is in control. He leads!