Quote by John Steinbeck

The only thing a man knows is himself.

— Alexander Smith

Every one is least known to himself, and it is very difficult for a man to know himself.

— Marcus Tullius Cicero

He who knows himself knows others.

— Charles Caleb Colton

Everybody knows worse of himself than he knows of other men.

— Samuel Johnson

In order to know what he is, a man must first know what the sum of this mysterious humanity is, a humanity made up…

— Leo Tolstoy

No man learns to know his inmost nature by introspection, for he rates himself sometimes too low, and often too high, by his own…

— Johann Wolfgang von Goethe

No matter how much you know a human being, you don't know him enough.

— Isaac Bashevis Singer

A really intelligent man feels what other men only know.

— Baron de Montesquieu

Man, who thinks he knows everything. But what does man know...Man cares only for himself, in his fear and hate.

— David Clement-Davies

He who knows himself properly can very soon learn to know all other men. It is all reflection.

— Georg C. Lichtenberg

They say: 'If a man knew himself, he would know all mankind.' I say: 'If a man loved mankind, he would know something of…

— Khalil Gibran

He that knows himself, knows others; and he that is ignorant of himself, could not write a very profound lecture on other men's heads.

— Charles Caleb Colton