Knowledge is in the end based on acknowledgement.

Only a man who lives not in time but in the present is happy.

An image is not a picture, but a picture can correspond to it.

If people did not sometimes do silly things, nothing intelligent would ever get done.

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.

We could present spatially an atomic fact which contradicted the laws of physics, but not one which contradicted the laws of geometry.

When philosophers use a word--"knowledge," "being," "object," "I," "proposition," "name"--and try to grasp the essence of the thing, one must always ask oneself: is the word ever actually used in this way in the language-game which is its original home?--What we do is to bring words back from their metaphysical to their everyday use.