It is certainly a good thing always to forgive with generosity, but it is no doubt just never to forget the wrongs received: they belong to the route that leads to inner maturity.

Secret thoughts are only half free: they fly undisturbed in the skies of the inner freedom, but they can never leave them.

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

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

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

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

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