Rev. Dr. Martin Luther King, Jr., wrote, "The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy."
or:
"Anyone can be polite untill a cow craps all over the front yard."
I could do a Flintstone and paste the whole thing, but some interesting reading is here:
http://www.xyonline.net/Measure_of_a_man.shtml
Got to love google.