We learn a lot from the mistakes of others, but even more from our own.

If you are living in the past or in the future, you will never find a meaning in the present.

We learn a lot from the mistakes of others, but even more from our own.

Do not confuse fantasy with imagination; the former consumes itself in daydreaming, the latter stimulates creativity in the arts and in the sciences.

Sometimes true tolerance requires an extraordinary strength, which we are often too weak to exercise.

Personal dignity is to be measured with the yardstick of one's conscience, not with that of other people's judgement.

As long as his strength permits, the poor mortal must always climb new mountains.