This was our method in both of the other phases of the mental life--Knowledge and Action.

Doing this, therefore, in the case of Feeling also, we find different terms applied to the different phases of feeling.

In the lowest sort of mental life, as we may suppose the helpless newborn child to have it, and as we also think it exists in certain low forms of animal life, feeling is not much more than Pleasures and Pains depending largely upon the physical conditions under which life proceeds.

It is likely that there are both Pleasures and Pains which are actually sensations with special nerve apparatus of their own; and there are also states of the Comfortable and the Uncomfortable, or of pleasant and unpleasant feeling, due to the way the mind is immediately affected.
These are conditions of Excitement added to the Sensations of Pleasure and Pain.
Coming up to the life of Memory and Imagination, we find many great classes of Emotions testifying to the attitudes which the mind takes toward its experiences.

They are remarkably rich and varied, these emotions.