Philosophy is not a theory but an activity.
We learn by rearranging what we know.
A philosophical problem has the form: I don't know my way about.
It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.
Uttering a word is like striking a note on the keyboard of the imagination.
Courage, not cleverness; not even inspiration, is the grain of mustard that grows up to be a great tree.