Scientific theories tell us ...

Scientific theories tell us what is possible; myths tell us what is desirable. Both are needed to guide proper action.
Scientific theories tell us what is possible; myths tell us what is desirable. Both are needed to guide proper action.
 John Maynard Smith

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

Evolutionary game theory is a way of thinking about evolution at the phenotypic level when the fitnesses of particular phenotypes depend on their frequencies in the population.
 John Maynard Smith
So far, we have been able to study only one evolving system and we cannot wait for interstellar flight to provide us with a second. If we want to discover generalizations about evolving systems, we will have to look at artificial ones.
 John Maynard Smith
Mathematics is so much easier than words mathematics makes things clear that words merely muddle and confuse and mess up.
 John Maynard Smith