Never give up on something that you can't go a day without thinking about.

Who is not liberal when young, does not have a heart. Who is not conservative when old, does not have a brain.

War is horrible, but slavery is worse.

I wonder whether any other generation has seen such astounding revolutions of data and values as those through which we have lived. Scarcely anything material or established which I was brought up to believe was permanent and vital, has lasted. Everything I was sure or taught to be sure was impossible, has happened.

If you simply take up the attitude of defending a mistake, there will no hope of improvement.

Censure is often useful, praise is often deceitful.

When danger is far off we may think of our weakness; when it is near we must not forget our strength.