One can defend common sense against the attacks of philosophers only by solving their puzzles, i.e., by curing them of the temptation to attack common sense.

Only describe, don't explain.

Humor is not a mood but a way of looking at the world. So if it is correct to say that humor was stamped out in Nazi Germany, that does not mean that people were not in good spirits, or anything of that sort, but something much deeper and more important.

Philosophy is not a body of doctrine but an activity. ...Without philosophy thoughts are, as it were, cloudy and indistinct: its task is to make them clear and to give them sharp boundaries.

Like everything metaphysical the harmony between thought and reality is to be found in the grammar of the language.

I give no sources, because it is indifferent to me whether what I have thought has already been thought before me by another.

If, for example, you were to think more deeply about death, then it would be truly strange if, in so doing, you did not encounter new images.