A child too, can never grasp the fact that the same mother who cooks so well, is so concerned about his cough, and helps so kindly with his homework, in some circumstance has no more feeling than a wall of his hidden inner world.
Don't ever dare to take your college as a matter of course - because, like democracy and freedom, many people you'll never know have broken their hearts to get it for you.
If it's very painful for you to criticize your friends - you're safe in doing it. But if you take the slightest pleasure in it, that's the time to hold your tongue.