No literature is sound, no ...

No literature is sound, no philosophy of action workable, if it doesn\'t take a hard look at itself.
No literature is sound, no philosophy of action workable, if it doesn't take a hard look at itself.
 John W. Campbell

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

Immunity corrupts; absolute immunity corrupts absolutely.
 John W. Campbell
Never accept the initial premise of the opposition.
 John W. Campbell
Science is not a sacred cow-but there are a large number of would-be sacred cowherds busily devoting quantities of time, energy and effort to the task of making it one, so they can be sacred cowherds.
 John W. Campbell