The world is made up of facts, not things.
Don't think, but look! (PI 66)
What is your aim in philosophy? To show the fly the way out of the fly-bottle.
The philosophical I is not the human being, not the human body or the human soul with the psychological properties, but the metaphysical subject, the boundary (not a part) of the world.
Sometimes, in doing philosophy, one just wants to utter an inarticulate sound.
For a truly religious man nothing is tragic.