Be as you wish to seem. Socrates
His resolve is not to seem the bravest, but to be. Aeschylus
The desire to seem clever often keeps us from being so. François de La Rochefoucauld
It is easier to seem worthy of positions one does not have than of those one does. François de La Rochefoucauld
That man is not truly brave who is afraid either to seem or to be, when it suits him, a coward. Edgar Allan Poe
Tis wisdom sometimes to seem a fool. Latin Proverb