Genius is sorrow's child.

The good times of today are the sad thoughts of tomorrow.

I am not now That which I have been.

Our greatest foes - and whom we must chiefly combat - are within.

Never lend your car to someone you've given birth to.

I could see that, if not actually disgruntled, he was far from being gruntled.

Effective action is always unjust.

You sort of start thinking anything's possible if you've got enough nerve.

Terrorism is the tactic of demanding the impossible, and demanding it at gunpoint.

Central banks don't have divine wisdom. They try to do the best analysis they can and must be prepared to stand or fall by the quality of that analysis.

No man for any considerable period can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

Even if you are divine, you don't disdain male consorts.

Tomorrow is the most important thing in life. Comes into us at midnight very clean. It's perfect when it arrives and it puts itself in our hands. It hopes we've learned something from yesterday.

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Every time you are tempted to react in the same old way, ask if you want to be a prisoner of the past or a pioneer of the future.

Quote me as saying I was mis-quoted.

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.?

I speak for the trees, for the trees have no tongues.

In the rush for justice it is important not to lose sight of principles the country holds dear.

Patriotism is the last refuge of a scoundrel.

Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense.