Black seems to make a colour cloudy, but darkness doesn't. A ruby could thus keep getting darker without ever becoming cloudy; but if it became blackish red, it would become cloudy.

The world is independent of my will.

For life in the present there is no death. Death is not an event in life. It is not a fact in the world.

All propositions are of equal value.

Whereof one cannot speak, thereof one must be silent.

It is much easier to bury a problem than to solve it.

Ethics and aesthetics are one.