What Science Cannot Discover, Mankind Cannot Know.

The Average Man's Opinions Are Much Less Foolish Than They Would Be If He Thought For Himself.

My Own View On Religion Is . . . It Helped In Early Days To Fix The Calendar, And . . . To Chronicle Eclipses . . . These Two Services I Am Prepared To Acknowledge.

Worry Is A Form Of Fear.

Vanity Is A Motive Of Immense Potency.

Humanistic Ethics Is Based On The Principle That Only Humans Themselves Can Determine The Criterion For Virtue And Not An Authority Transcending Us.