David Hume. Enquiry concerning human understanding (№ 405050)

The great destroyers of Pyrrhoism, or excessive skepticism, are the activities, occupations, and affairs of everyday life. These principles can flourish and dominate [philosophical] schools, where it is really difficult, if not impossible, to refute them. But as soon as they come out of the shadows, and through the presence of real objects that excite our affects and feelings, they come face to face with the strongest principles of our nature, they will disappear like smoke, leaving the most convinced skeptic in the same position as other mortals.