Laughter is the corrective force which prevents us from becoming cranks.

To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.

ACT as men of thought; THINK as men of action.

It is the very essence of intelligence to coordinate means with a view to a remote end, and to undertake what it does not feel absolutely sure of carrying out.

I believe that the time given to refutation in philosophy is usually time lost. Of the many attacks directed by many thinkers against each other, what now remains? Nothing, or assuredly very little. That which counts and endures is the modicum of positive truth which each contributes. The true statement is, of itself, able to displace the erroneous idea, and becomes, without our having taken the trouble of refuting anyone, the best of refutations.

And I also see how this body influences external images: it gives back movement to them.

Only those ideas that are least truly ours can be adequately expressed in words.