The whole point of getting things done is knowing what to leave undone.

Believe and act as if it were impossible to fail.

Important principles may, and must, be inflexible.

We do not judge the people we love.

God gives the nuts, but he does not crack them.

Really, the only thing that makes sense is to strive for greater collective enlightenment.

A man doesn't know what he knows until he knows what he doesn't know.

Great tranquility of heart is his who cares for neither praise nor blame.

We are all gifted. That is our inheritance.

Prosperity tries the fortunate, adversity the great.

There is no greater impediment to the advancement of knowledge than the ambiguity of words.

Nothing endures but personal qualities.

We have all the light we need, we just need to put it in practice.

We forfeit three-quarters of ourselves in order to be like other people.

Brainy folks were also present in Lyndon Johnson's administration, especially in the Pentagon, where Secretary of Defense Robert McNamara's brilliant 'whiz kids' tried to micro-manage the Vietnam war, with disastrous results.

We cling to our own point of view, as though everything depended on it. Yet our opinions have no permanence; like autumn and winter, they gradually pass away.

There are three musts that hold us back: I must do well. You must treat me well. And the world must be easy.

We can learn something new anytime we believe we can.

Idealism increases in direct proportion to one's distance from the problem.

It is only in our decisions that we are important.

The soul is placed in the body like a rough diamond, and must be polished, or the luster of it will never appear.

Fortune favors the audacious.

What do you hang on the walls of your mind?

Be intent upon the perfection of the present day.

A pure hand needs no glove to cover it.

Sometimes you can know too much. A lot of brainy people like Stephen Fry are quite depressive.

The mind cannot foresee its own advance.

Ill habits gather unseen degrees, as brooks make rivers, rivers run to seas.

The more refined and subtle our minds, the more vulnerable they are.

The possible ranks higher than the actual.

I like both athletic girls and girly girls. It depends on their personality. I like girls who can go out and play sports with me and throw the football around, but you don't want a girl who's too much tougher than you. I like brainy girls who can respond to what I'm saying.

Our nature is the mind. And the mind is our nature.

At times I think and at times I am.

The envious man grows lean at the success of his neighbor.

The return we reap from generous actions is not always evident.

We must be our own before we can be another's.

Not only strike while the iron is hot, but make it hot by striking.

Good order is the foundation of all things.

Clarity is the counterbalance of profound thoughts.

Man is born to live and not to prepare to live.

Unless we remember we cannot understand.

There are no new ideas. There are only new ways of making them felt.

You exist only in what you do.

I do not seek. I find.

I'm not a genius. I'm just a tremendous bundle of experience.

One can resist the invasion of an army but one cannot resist the invasion of ideas.

What we do belongs to what we are; and what we are is what becomes of us.

It is easy to get everything you want, provided you first learn to do without the things you cannot get.

Our self image, strongly held, essentially determines what we become.

All serious daring starts from within.