What Science Cannot Discover, Mankind Cannot Know.

Science Is At No Moment Quite Right, But It Is Seldom Quite Wrong, And Has, As A Rule, A Better Chance Of Being Right Than The Theories Of The Unscientific. It Is, Therefore, Rational To Accept It Hypothetically.

The Desire For Legitimate Offspring Is, In Fact, According To The Catholic Church, The Only Motive Which Can Justify Sexual Intercourse.

Dogmatism And Skepticism Are Both, In A Sense, Absolute Philosophies; One Is Certain Of Knowing, The Other Of Not Knowing. What Philosophy Should Dissipate Is Certainty, Whether Of Knowledge Or Ignorance.

The Above Proposition Is Occasionally Useful.

But As The Work Proceeded I Was Continually Reminded Of The Fable About The Elephant And The Tortoise. Having Constructed An Elephant Upon Which The Mathematical World Could Rest, I Found The Elephant Tottering, And Proceeded To Construct A Tortoise To Keep The Elephant From Falling. But The Tortoise Was Not More Secure Than The Elephant, And After Some Twenty Years Of Very Arduous Toil, I Came To The Conclusion That There Was Nothing More That I Could Do In The Way Of Making Mathematical Knowledge Indubitable.