If there were a verb meaning "to believe falsely," it would not have any significant first person, present indicative.

A logical picture of facts is a thought.

What has history to do with me? Mine is the first and only world! I want to report how I find the world. What others have told me about the world is a very small and incidental part of my experience. I have to judge the world, to measure things.

What is left over if I subtract the fact that my arms goes up from the fact that I raise my arm?

I am not interested in constructing a building, so much as in having a perspicuous view of the foundations of possible buildings.

Think of words as instruments characterized by their use, and then think of the use of a hammer, the use of a chisel, the use of a square, of a glue pot, and of the glue.

The aspects of things that are most important for us are hidden because of their simplicity and familiarity. (One is unable to notice something because it is always before one’s eyes.) The real foundations of his enquiry do not strike a man at all