All credibility all good conscience all evidence of truth come only from the senses.

All credibility, all good conscience, all evidence of truth, come only from the senses.

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Without music life would be a mistake.

The man of knowledge must be able not only to love his enemies but also to hate his friends.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance, one cannot fly into flying.

It is my ambition to say in ten sentences what others say in a whole book.

To see what is in front of one's nose needs a constant struggle.

The further a society drifts from the truth, the more it will hate those who speak it.

There is only one good, knowledge, and one evil, ignorance.

Good night and sweet dreams, my love!