Intelligence without ambition is a bird without wings.

If everyone is thinking alike, then somebody isn’t thinking.

Continuous effort – not strength or intelligence – is the key to unlocking our potential.

Talent wins games, but teamwork and intelligence wins championships.

The difference between stupidity and genius is that genius has its limits.

Genius is more often found in a cracked pot than in a whole one.

Joy in looking and comprehending is nature’s most beautiful gift.

Your intellect may be confused, but your emotions will never lie to you.

Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence, and honest purpose, as well as perspiration. Seeming to do is not doing.

Talent hits a target no one else can hit; Genius hits a target no one else can see.

I’m not the smartest fellow in the world, but I can sure pick smart colleagues.

I know that I am intelligent, because I know that I know nothing.

A smart man makes a mistake, learns from it, and never makes that mistake again. But a wise man finds a smart man and learns from him how to avoid the mistake altogether.

To expect the unexpected shows a thoroughly modern intellect.

I don’t even call it violence when it’s in self defense; I call it intelligence.

An intelligent man is sometimes forced to be drunk to spend time with his fools.

Common sense is not so common.

Thinking is the hardest work there is, which is probably the reason why so few engage in it.

Promise me you’ll always remember: You’re braver than you believe, and stronger than you seem, and smarter than you think.

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.