Bruce Lee was more than just an actor, but a true philosopher as well. His thoughts and sayings are highly regarded by people. This short presentation by one of the slideshare user demonstrates it very well.
Adapted from the Caltech commencement address given in 1974.
During the Middle Ages there were all kinds of crazy ideas, such
as that a piece of rhinoceros horn would increase potency. Then a
method was discovered for separating the ideas--which was to try
one to see if it worked, and if it didn't work, to eliminate it.
This method became organized, of course, into science. And it
developed very well, so that we are now in the scientific age. It
is such a scientific age, in fact that we have difficulty in
understanding how witch doctors could ever have existed, when
nothing that they proposed ever really worked--or very little of
it did. Read More