Problems are not stop signs, ...
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
Never give up, for that is just the place and time that the tide will turn.
Harriet Beecher Stowe
No bird soars too high if he soars with his own wings.
Quotes from the same author
Failure doesn't mean you are a failure it just means you haven't succeeded yet.
Robert Schuller
I'd rather attempt to do something great and fail than to attempt to do nothing and succeed.
Robert Schuller
Spectacular achievement is always preceded by unspectacular preparation.
Robert Schuller