Total internal reflection

Definition and stakes

William James,  The Principles of Psychology, Volume 1…

“ On the one hand, they advise you to isolate yourself, as far as possible, from every external sensation, especially every intellectual work,—for if you were to busy yourself even with the simplest calculation, what would become of internal observation?—on the other hand, after having with the utmost care attained this state of intellectual slumber, you must begin to contemplate the operations going on in your mind, when nothing there takes place! ”
Source: Gutenberg

William James,  The Principles of Psychology, Volume 2…

“ Instead of experiences engendering the 'inner relations,' the inner relations are what engender the experiences here.
What happens in the brain after experience has done its utmost is what happens in every material mass which has been fashioned by an outward force,—in every pudding or mortar, for example, which I may make with my hands. The fashioning from without brings the elements into collocations which set new internal forces free to exert their effects in turn.
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Source: Gutenberg

George Gore,  The Scientific Basis of National Progress… (1882)

“ Similarly with most of our mental actions, they are compounds of feeling and intellect, and produced by many causes, such as hereditary tendency, acquired habit, internal and external mental excitants, dogmatic belief, knowledge of empirical rules, and occasionally of verified principles. Several of these causes also frequently conspire to produce a single idea or decision. ”
Source: Wikisource

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