It is now no mystery that some quite influential 'philosophers' were 'mentally' ill.

If we, who live outside asylums, act as if we lived in a fictitious world- that is to say, if we are consistent with our beliefs- we cannot adjust ourselves to actual conditions, and so fall into many avoidable semantic difficulties. But the so-called normal person practically never abides by his beliefs, and when his beliefs are building for him a fictitious world, he saves his neck by not abiding by them. A so-called "insane" person acts upon his beliefs, and so cannot adjust himself to a world which is quite different from his fancy.

Two important characteristics of maps should be noticed. A map is not the territory it represents, but, if correct, it has a similar structure to the territory, which accounts for its usefulness.

I am the same kind of moron as the rest of you, it's the method that does the work, for me as well as for you.

Mathematics and logic have been proved to be one; a fact from which it seems to follow that mathematics may successfully deal with non-quantitative problems in a much broader sense than was suspected to be possible.

There are two ways to slice easily thorugh life; to believe everything or to doubt everything. Both ways save us from thinking.

Thus, we see that one of the obvious origins of human disagreement lies in the use of noises for words.