That which cannot be said must not be said. That which cannot be said, one must be silent thereof.

With my full philosophical rucksack I can only climb slowly up the mountain of mathematics.

The depressed man lives in a depressed world.

We find certains things about seeing puzzling, because we do not find the whole business of seeing puzzling enough.

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.

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

Because our goals are not lofty but illusory, our problems are not difficult, but nonsensical.