That Mysterious Independent Variable Of

Unfortunately, It Is Much Easier To Shut One's Eyes To Good Than To Evil. Pain And Sorrow Knock At Our Doors More Loudly Than Pleasure And Happiness; And The Prints Of Their Heavy Footsteps Are Less Easily Effaced.

My Reflection, When I First Made Myself Master Of The Central Idea Of The 'origin', Was, 'how Extremely Stupid Not To Have Thought Of That!'

In Matters Of The Intellect, Do Not Pretend That Conclusions Are Certain Which Are Not Demonstrated Or Demonstrable. That I Take To Be The Agnostic Faith, Which If A Man Keep Whole And Undefiled, He Shall Not Be Ashamed To Look The Universe In The Face, Whatever The Future May Have In Store For Him.

The Only People, Scientific Or Other, Who Never Make Mistakes Are Those Who Do Nothing.

It Is Wrong For A Man To Say That He Is Certain Of The Objective Truth Of Any Proposition Unless He Can Produce Evidence Which Logically Justifies That Certainty.