Leadership and learning are indispensable to each other.

Once you start a working on something, don't be afraid of failure and don't abandon it. People who work sincerely are the happiest.

From each according to his abilities, to each according to his needs.

When asked, 'How do you write?' I invariably answer, 'one word at a time.'

Opportunity is missed by most people because it is dressed in overalls and looks like work.

To invent, you need a good imagination and a pile of junk.

Nothing will work unless you do.

If youre in the luckiest one per cent of humanity, you owe it to the rest of humanity to think about the other 99 per cent.

We struggle with the complexities and avoid the simplicities.

It is your decisions, and not your conditions, that determine your destiny.

No man needs sympathy because he has to work, because he has a burden to carry. Far and away the best prize that life offers is the chance to work hard at work worth doing.

Old Professors never die, they just lose their faculties.

Art calls for complete mastery of techniques, developed by reflection within the soul.

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

Try not to become a man of success but rather to become a man of value.

You gain strength, courage and confidence by every experience in which you really stop to look fear in the face.... You must do the thing you think you cannot do.

You cannot change your destination overnight, but you can change your direction overnight

There is nothing more difficult to carry out, nor more doubtful of success, nor more dangerous to handle, that to institute a new order of things

One must be sane to think clearly, but one can think deeply and be quite insane.

A good objective of leadership is to help those who are doing poorly to do well and to help those who are doing well to do even better.

Either you run the day or the day runs you.