“No great achievement is possible without persistent work.”

“The end of labor is to gain leisure.”

“There is no substitute for hard work. There will be disappointments, but the harder the work, the luckier you will get. Never be satisfied with less than your very best effort. If you strive for the top and miss, you'll still beat the pack.”

“Thunder is good, thunder is impressive; but it is the lightning that does the work.”