Nature has neither core nor skin: she’s both at once outside and in.

It is sometimes essential for a husband and a wife to quarrel - they get to know each other better.

All sects seem to me to be right in what they assert, and wrong in what they deny.

Music is either sacred or secular. The sacred agrees with its dignity, and here has its greatest effect on life, an effect that remains the same through all ages and epochs. Secular music should be cheerful throughout.

Errors belong to libraries; truth, to the human mind.

There is no patriotic art and no patriotic science.

None are more hopelessly enslaved than those who falsely believe they are free.