Curiosity begins as an act of tearing to pieces or analysis.

It is convenient to distinguish the two kinds of experience which have thus been described, the experienc-ing and the experienc-ed, by technical words.

Desire then is the invasion of the whole self by the wish, which, as it invades, sets going more and more of the psychical processes; but at the same time, so long as it remains desire, does not succeed in getting possession of the self.

Thus the same object may supply a practical perception to one person and a speculative one to another, or the same person may perceive it partly practically and partly speculatively.

The mental act of sensation which issues in reflex movement is so simple as to defy analysis.

Mental life is indeed practical through and through. It begins in practice and it ends in practice.

But unfortunately Locke treated ideas of reflection as if they were another class of objects of contemplation beside ideas of sensation.