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 perceptive act is a reaction of the mind upon the object of which it is the perception.

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

The sensory acts are accordingly distinguished by their objects.

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

Both expectations and memories are more than mere images founded on previous experience.

Such being the nature of mental life, the business of psychology is primarily to describe in detail the various forms which attention or conation assumes upon the different levels of that life.