I am certain there is too ...
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
In truth, one of our company, the solemn warrior Ecthgow, was so demented from liquor that he was drunk while still upon his horse, and he fell attempting to dismount. Now the horse kicked him in the head, and I feared for his safety, but Ecthgow laughed and kicked the horse back.
Michael Crichton
The second reason to abandon environmental religion is more pressing. Religions think they know it all, but the unhappy truth of the environment is that we are dealing with incredibly complex, evolving systems, and we usually are not certain how best to proceed. Those who are certain are demonstrating their personality type, or their belief system, not the state of their knowledge.
Michael Crichton
You are the reason why he exists on this earth. You don't have the right to abandon him just because he's inconvenient or has trouble in school.
Michael Crichton
This is the gift of your species and this is the danger, because you do not choose to control your imaginings. You imagine wonderful things and you imagine terrible things, and you take no responsibility for the choice. You say you have inside you both the power of good and the power of evil, the angel and the devil, but in truth you have just one thing inside you - the ability to imagine.
Michael Crichton
We think we know what we are doing. We have always thought so. We never seem to acknowledge that we have been wrong in the past, and so might be wrong in the future. Instead, each generation writes off earlier errors as the result of bad thinking by less able minds - and then confidently embarks on fresh errors of its own.
Michael Crichton