He that in the ordinary affairs of life would admit of nothing but direct plain demonstration would be sure of nothing in this world but of perishing quickly.
John LockeThough the water running in the fountain be every ones, yet who can doubt, but that in the pitcher is his only who drew it out?
John LockeThe thoughts that come often unsought, and, as it were, drop into the mind, are commonly the most valuable of any we have.
John Locke