By an object, I mean anything that we can think, i.e. anything we can talk about.

I define a Sign as anything which is so determined by something else, called its Object, and so determines an effect upon a person, which effect I call its Int…

The entire universe is perfused with signs, if it is not composed exclusively of signs.

Unless man have a natural bent in accordance with nature's, he has no chance of understanding nature at all.

I believe that at the end of the century the use of words and general educated opinion will have altered so much that one will be able to speak of machines thi…

Faced with the nonsense question 'What is the meaning of a word?' and perhaps dimly recognizing it to be nonsense, we are nevertheless not inclined to give it …

Are designations congruent with things? Is language the adequate expression of all realities? It is only by means of forgetfulness that man can ever reach the …