I rate enthusiasm even above ...
More phrases
Effort only fully releases its reward after a person refuses to quit.
Never complain and never explain.
A good plan violently executed now is better than a perfect plan executed next week.
George S. Patton
Problems are not stop signs, they are guidelines.
Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
Harriet Beecher Stowe
Quotes from the same author
No scientific subject has ever aroused quite the same mixture of hopes and fears [as atomic energy].
Edward Victor Appleton
I don't mind what language an opera is sung in so long as it is the language I don't understand.
Edward Victor Appleton