Attitude, not Aptitude, determines Altitude.

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

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

A person who spends more than he earns is a fool

What's real and what's true aren't necessarily the same.

A person reveals his character by nothing so clearly as the joke he resents.

Immoderate desire is the mark of a child, not a man.

Choose rather to be strong of soul than strong of body.

Each problem that I solved became a rule which served afterwards to solve other problems.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.

Intelligence is the ability to adapt to change.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

Respect yourself if you would have others respect you.

None but ourselves can free our minds.

I have no desire to make windows into mens souls

Circumstances do not make a man, they reveal him.

The greatest deception men suffer is from their own opinions.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

What you're thinking is what you're becoming.

Life's battles don't always go to the stronger or faster man. But sooner or later, the man who wins is the man who thinks he can.