The most vulnerable and yet most unconquerable of things is human vanity; nay, through being wounded its strength increases and can grow to giant proportions.

An attack on the roots of passion means an attack on the roots of life.

What we know oman today is limited precisely by the extent to which we have regarded him as a machine.

This is the hardest of all: to close the open hand out of love, and keep modest as a giver.

Whatever is gold does not glitter. A gentle radiance belongs to the noblest metal.

The broad effects which can be obtained by punishment in man and beast, are the increase of fear, the sharpening of the sense of cunning, the mastery of the desires; so it is that punishment tames man, but does not make him "better.".

The Gay Science, section 108