Don't be content to be the chip off the old block - be the old block itself.

There is no better exercise than to study and devour a picture, and then, without looking at it again, to attempt the next day to reproduce it.

It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.

History with its flickering lamp stumbles along the trail of the past, trying to reconstruct its scenes, to revive its echoes, and kindle with pale gleams the passion of former days.

I am an optimist. It does not seem too much use being anything else.

If we look to our responsibility to the generations yet unborn who will come after us, how can we fail to recognize that peace and freedom are inextricably bound up one with another and that the threat to one is a threat to both

To improve is to change; to be perfect is to change often.