There has been a lot written about the President of Columbia's speech calling the President of Iran a 'petty and cruel dictator' as speaking truth to power. Frankly, that's crap. When you speak truth to power, it is to it's face. Stupid though they may be, the protesters that stand up in Congress or at press conferences and call out their targets are speaking to power - I don't always agree they are speaking truth however - are living examples of the consequences our Founding Fathers knew all too well. Speaking truth to power has consequences, and absent those actual or potential consequences, what you get is a President of Columbia University jabbering like an adult in a Peanut's sketch.
THIS is speaking truth to power.