The best revenge is to be unlike him who performed the injury.

Moderation in temper is always a virtue; but moderation in principle is always a vice.

Not everything that can be counted counts, and not everything that counts can be counted.

I think, therefore I am.

Whatever it is you're seeking won't come in the form you're expecting.

When you judge another, you do not define them, you define yourself.

Act as if the maxim of your action were to become through your will a general natural law

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

Science may set limits to knowledge, but should not set limits to imagination.

Where there is anger, there is always pain underneath.

It is tact that is golden, not silence.

Let no man pull you low enough to hate him.

As our case is new, we must think and act anew.

A good teacher protects his pupils from his own influence.

One never notices what has been done; one can only see what remains to be done.

You don't become what you want, you become what you believe

There is nothing more uncommon than common sense.

It’s your road and yours alone. Others may walk it with you, but no one can walk it for you.

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.

How often it is that the angry man rages denial of what his inner self is telling him.

Stupidity is a talent for misconception.