To use words to sense reality is like going with a lamp to search for darkness.

What we call progress consists in coordinating ideas with realities.

Whatever you may say something is, it is not!

As words are not the things we speak about, and structure is the only link between them, structure becomes the only content of knowledge. If we gamble on verbal structures that have no observable empirical structures, such gambling can never give us any structural information about the world. Therefore such verbal structures are structurally obsolete, and if we believe in them, they induce delusions or other semantic disturbances.

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.

Second order effects, such as belief in belief, makes fanaticism.

The map is not the territory.