Feynman gave a whole lecture on this subject - the second or third lecture of the Messenger Lectures (much better timepass than night time TV show, second only to the Wizards Lectures and the five three seasons of The X-Files).
It seems that this is an ideal case for the Less Is More principle.
If anyone else is wondering what "The Wizards' Lectures" are, they are a set of MIT video lectures from 1986 by Abelson and Sussman on "Structure and Interpretation of Computer Programs"
Thanks! I was too enthusiastic to emphasize that the Abelson and Sussman lectures are out of the context of Physics. Nevertheless these are no less classic than Feynman's.
It seems that this is an ideal case for the Less Is More principle.