More from Bertrand Russell
- Marriage and Morals (1929)
- Why I Am Not a Christian (1927), “The Emotional Factor”
People/Bertrand Russell/Quote

Not to be absolutely certain is, I think, one of the essential things in rationality.
Am I An Atheist Or An Agnostic? (1947)
Quote and source from Wikiquote, CC BY-SA 4.0