Criticize the act, not the person.
All imperfection is easier to tolerate if served up in small doses.
A good teacher protects his pupils from his own influence.
The oldest, shortest words- 'yes' and 'no'- are those which require the most thought.
There are two educations. One should teach us how to make a living and the other how to live.
It has seemed to be more necessary to have regard to the weight of words rather than to their number.
Drop the idea that you are Atlas carrying the world on your shoulders. The world would go on even without you. Don't take yourself so seriously.
Empty pockets never held anyone back. Only empty heads and empty hearts can do that.
Everything excellent is as difficult as it is rare.
Judge a man by his questions rather than by his answers.
There is nothing more uncommon than common sense.
Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.
Promises are like crying babies in a theater, they should be carried out at once.
Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.
The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.
Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy.
Circumstances do not make a man, they reveal him.
An intelligent hell would be better than a stupid paradise.
He who chooses the beginning of the road chooses the place it leads to.
Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.