The best weapon against an enemy is another enemy.

Whoever, at any time, has undertaken to build a new heaven has found the strength for it in his own hell.

One never dives into the water to save a drowning man more eagerly than when there are others present who dare not take the risk.

Unconsciously we seek the principles and opinions which are suited to our temperament, so that at last it seems as if these principles and opinions had formed our character and given it support and stability.

The various languages placed side by side show that with words it is never a question of truth, never a question of adequate expression; otherwise, there would not be so many languages. The 'thing in itself' (which is precisely what the pure truth, apart from any of its consequences, would be) is likewise something quite incomprehensible to the creator of language and something not in the least worth striving for.

We feign pity when we want to demonstrate our ascendancy over feelings of hostility: but usually in vain. Whenever we notice this,there is an accompanying surge in those hostile sensations.

Necessity is not an established fact, but an interpretation.