Believe those who seek the truth, doubt those who find it; doubt all, but do not doubt yourself.
The most gifted natures are perhaps also the most trembling.
Laws and rules of conduct are for the state of childhood; education is an emancipation.
Every instant of our lives is essentially irreplaceable: you must know this in order to concentrate on life.
'Therefore' is a word the poet must not know.
It is with noble sentiments that bad literature gets written.