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.

Whatever you may say something is, it is not!

Any object of thought is both 'more than what we think, and different'.

If words are not things, or maps are not the actual territory, then, obviously, the only possible link between the objective world and the linguistic world is found in structure, and structure alone.

It is amusing to discover, in the twentieth century, that the quarrels between two lovers, two mathematicians, two nations, two economic systems, usually assumed insoluble in a finite period should exhibit one mechanism, the semantic mechanism of identification - the discovery of which makes universal agreement possible, in mathematics and in life.

What we call progress consists in coordinating ideas with realities.

Psycho-galvonic experiments show clearly that every emotion or thought is always connected with some electrical current.