Not by wrath does one kill, but by laughter.

The wheel and the brake have different duties, but also one in common: to hurt one another.

Knowledge kills action; action requires the veils of illusion.

There is nothing for which men ask to be paid dearer than for humiliation.

It is hard enough to remember my opinions, without also remembering my reasons for them!

As soon as we climb higher than those who had at one time admired us, we appear to them as though we have sunken and fallen down:for, in any event, they had at one time supposed that they were with us (even if it were through us) on the heights.

Every achievement, every step forward in knowledge, is the consequence of courage, of toughness towards oneself, of sincerity to oneself