There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!

Brief is this existence, as a visit in a strange house. The path to be pursued is poorly lit by a flickering consciousness.

Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.

The mind that opens to a new idea never returns to its original size

The only justification for our concepts and systems of concepts is that they serve to represent the complex of our experiences; beyond this they have not legitimacy.

I cannot seriously believe in it [quantum theory] because the theory cannot be reconciled with the idea that physics should represent a reality in time and space, free from spooky actions at a distance [spukhafte Fernwirkungen].

What is the meaning of human life, or of organic life altogether? To answer this question at all implies a religion.