To desire immortality for the individual is really the same as wanting to perpetuate an error forever.

The problem with Germans is that they look in the clouds for what lies at their feet.

This actual world of what is knowable, in which we are and which is in us, remains both the material and the limit of our consideration.

A high degree of intellect tends to make a man unsocial.

I have long held the opinion that the amount of noise that anyone can bear undisturbed stands in inverse proportion to his mental capacity and therefore be regarded as a pretty fair measure of it.

A word too much always defeats its purpose.

The assumption that animals are without rights, and the illusion that our treatment of them has no moral significance, is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality.