David Hume Quote

It seems certain, that though a man, in a flush of humour, after intense reflection on the many contradictions and imperfections of human reason, may entirely renounce all belief and opinion, it is impossible for him to persevere in this total scepticism, or make it appear in his conduct for a few hours.

Dialogues Concerning Natural Religion: Hume (ed. Prentice Hall, 1947) - ISBN: 9780024129307