- The most significant truths begin from the point where the technical truths end.
- The knowable is unimportant, and the unknowable is important.
- Antagonists of religion do not want the same criterion by which they have rejected religion, to be brought forward by religious people to affirm its truth.
- “There is only one constant preoccupation: I have throughout been anxious to discover how much one can be said to know and with what degree of certainty or doubtfulness.” – Russell
- “Logic and mathematics …are the alphabet of the book of nature, not the book itself” – Bertrand Russell
- All the heroes who had discovered the laws of nature were believers in God, but, ironically, when their research was brought before the public, it was thought that their discoveries had rendered meaningless the very existence of God.
- “Nature does not explain, she is herself in need of explanation” – Cecil Boyce Hamann