What was it that made anything come out of the body?
the EXPULSIVE FACULTY.

What moved?
the MOTIVE FACULTY.

And so in the mind, the INTELLECTUAL FACULTY, or the understanding, understood; and the ELECTIVE FACULTY, or the will, willed or commanded.

This is, in short, to say, that the ability to digest, digested; and the ability to move, moved; and the ability to understand, understood.

For faculty, ability, and power, I think, are but different names of the same things: which ways of speaking, when put into more intelligible words, will, I think, amount to thus much;--That digestion is performed by something that is able to digest, motion by something able to move, and understanding by something able to understand.