We forget our guilt when we have confessed it to another, but the other does not usually forget it.

Science ... has no consideration for ultimate purposes, any more than Nature has, but just as the latter occasionally achieves things of the greatest suitableness without intending to do so, so also true science, as the imitator of nature in ideas, will occasionally and in many ways further the usefulness and welfare of man,-but also without intending to do so.

The press, the machine, the railway, the telegraph are premises whose thousand-year conclusion no one has yet dared to draw.

Let thy virtue be too high for the familiarity of names, and if thou must speak of it, be not ashamed to stammer about it.

Whoever despises himself still esteems the despiser within himself.

One can lie with the mouth, but with the accompanying grimace one nevertheless tells the truth.

As long as you still experience the stars as something "above you", you lack the eye of knowledge.