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

A house divided against itself cannot stand.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

A house is not a home unless it contains food and fire for the mind as well as the body.

In any moment of decision, the best thing you can do is the right thing. The worst thing you can do is nothing.

If you don't behave as you believe, you will end by believing as you behave.

Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.

The smaller the mind, the greater the conceit.

Everything excellent is as difficult as it is rare.

You always admire what you really don't understand.

To a wise and good man the whole earth is his fatherland.

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

Be silent or let thy words be worth more than silence.

Medicine heals diseases of the body, wisdom frees the soul from passions.

The greatest of wealth is the richness of the soul.

Courage is resistance to fear, mastery of fear - not absence of fear.

There is no question climate change is happening. The only arguable point is what part humans are playing in it.

To avoid criticism say nothing, do nothing, be nothing.

If we do not lay out ourselves in the service of mankind whom should we serve?

Man is not the creature of circumstances, Circumstances are the creatures of men.