A mathematical truth is universal and eternal.
A story is not just what is told, but what is left untold.
You cannot step into the same river twice.
La literatura es una mentira que dice la verdad.
Confucious said that real knowledge is knowing the extent of one's ignorance.Aristotle and Socrates said the same thing.Is it a skill that can be taught or learned? It probably can, if you have enough of a stake riding on the outcome...