Read this many years ago and can't remember who it was about. Nor can I remember the exact quote. The story goes:
Famous computer scientist/professor is teaching a class. Student is having some problem w/ a machine and wants to reboot it, hoping to fix the issue. Professor chides him, saying something to the effect of "you can't expect rebooting to fix the problem unless you 'Truly Understand What Is Going On'". Professor then proceeds to reboot the computer and the issue resolves. ;)
Who was it?