Those who are failures from the start, downtrodden, crushed -- it is they, the weakest, who must undermine life among men, who call into question and poison most dangerously our trust in life, in man, and in ourselves.

Verily, I do not want to be like the ropemakers: They drag out their threads and always walk backwards.

The value of a man can only be measured with regard to other men.

The one conclusive argument that has at all times discouraged people from drinking a poison is not that it kills but rather that it tastes bad.

These small things - nutrition, place, climate, recreation, the whole casuistry of selfishness - are inconceivably more important than everything one has taken to be important so far.

Then is what you see through this window onto the world so lovely that you have no desire whatsoever to look out through any other window, and that you even make an attempt to prevent others from doing so?

When our brain feels too weak to deal with our opponent's objections, our heart answers by casting suspicion on their underlying motives.