Quotes on Probable Cause

All the higher, more penetrating ideals are revolutionary. They present themselves far less in the guise of effects of past experience than in that of probable causes of future experience, factors to which the environment and the lessons it has so far taught us must learn to bend.

Reality is not always probable, or likely.

Variant: When it is not in our power to follow what is true, we ought to follow what is most probable.