Personally, People Know Themselves Very Poorly.

I Once Knew An Otherwise Excellent Teacher Who Compelled His Students To Perform All Their Demonstrations With Incorrect Figures, On The Theory That It Was The Logical Connection Of The Concepts, Not The Figure, That Was Essential.

Scientists Must Use The Simplest Means Of Arriving At Their Results And Exclude Everything Not Perceived By The Senses.

Personally, People Know Themselves Very Poorly.

In Reality, The Law Always Contains Less Than The Fact Itself, Because It Does Not Reproduce The Fact As A Whole But Only In That Aspect Of It Which Is Important For Us, The Rest Being Intentionally Or From Necessity Omitted.

Ordinarily Pleasure And Pain Are Regarded As Different From Sensations.