The two greatest teachers we know in the West, Socrates and Jesus, were not without kindness, to be sure, but both had a sharp edge. Jesus asked people to do the impossible. He wanted them to give up all of their possessions and follow him, to change their lives utterly around. Socrates asked one badgering question after another about why his contemporaries behaved as they did. In the end, society could not tolerate either of these men, and did away with them.
—Mark Edmundson, Teacher: The One Who Made the Difference