Genius is what makes us forget the master’s talent.
All mathematics is tautology.
Only a man who lives not in time but in the present is happy.
A propositional sign, applied and thought out, is a thought. A thought is a proposition with a sense.
A wheel that can be turned though nothing else moves with it, is not a part of the mechanism.
Elementary propositions consist of names.
All propositions are of equal value.
It would strike me as ridiculous to want to doubt the existence of Napoleon; but if someone doubted the existence of the earth 150years ago, perhaps I should be more willing to listen, for now he is doubting our whole system of evidence.
It is possible – indeed possible even according to the old conception of logic – to give in advance a description of all ‘true’ logical propositions. Hence there can never be surprises in logic.
Always get rid of theory private object in this way: assume that it constantly changes, but that you do not notice the change because your memory constantly deceives you.
Suppose we think while we talk or write – I mean, as we normally do – we shall not in general say that we think quicker than we talk, but the thought seems not to be separate from the expression.
The so-called law of induction cannot possibly be a law of logic, since it is obviously a proposition with a sense. – Nor, therefore, can it be an a priori law.
I Once wrote: “In mathematics process and result are equivalent.”
It’s only by thinking even more crazily than philosophers do that you can solve their problems.
Kierkegaard was by far the most profound thinker of the last century. Kierkegaard was a saint.
The totality of facts determines both what is the case, and also all that is not the case.
Our ordinary language has no means for describing a particular shade of color. Thus it is incapable of producing a picture of this color.
I am still at Trattenbach, surrounded, as ever, by odiousness and baseness. I know that human beings on the average are not worth much anywhere, but here they are much more good-for-nothing and irresponsible than elsewhere.
There is no criterion by which to recognize what is a color, except that it is one of our colors.
Humor is not a mood but a way of looking at the world.