Physics is Phun!
A High School Physics teacher once told me that.
I learned that Science teachers in college have no humor.
"Charlie was a Chemist, Charlie is no more. What Charlie thought was H2O was H2SO4!"
"In order to completely solve a problem, you must make sure that the root of the problem is completely removed! If you leave the root, the problem will come back later to get you." - Norman King