A man's thinking goes on within his consciousness in a seclusion in comparison with which any physical seclusion is an exhibition to public view.

To think that you are not following a rule is to follow a rule.

There are, indeed, things that cannot be put into words. They make themselves manifest. They are what is mystical.

If life becomes hard to bear we think of a change in our circumstances. But the most important and effective change, a change in our own attitude, hardly even occurs to us, and the resolution to take such a step is very difficult for us.

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.

Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental.

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