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The restriction of studies of human intellect and character to studies of conscious states was not without influence on a scientific studies of animal psychology.

Remember above all that mental stability comes by examining the contents of the mind, not by avoidence.

I cannot escape the objection that there is no state of mind, however simple, that does not change every moment.

In experimental philosophy, we are to look upon propositions inferred by general induction from phenomena as accurately or very nearly true, notwithstanding any contrary hypotheses that may be imagined, till such time as other phenomena occur by which they may either be made more accurate or liable to exceptions.

The mind cannot foresee its own advance.

Mental events, it is said, are not passive happenings but the acts of a subject.

Science rests on reason and experiment, and can meet an opponent with calmness; but a belief is always sensitive.

The proposition that humans have mental characteristics wholly absent in non-humans is inconsistent with the theory of evolution.

In all the sciences except Psychology we deal with objects and their changes, and leave out of account as far as possible the mind which observes them.