The mind or spirit is either arranged entirely by the molecules it is connected with, and these molecules move with the same automatic necessity that the earth moves with; or else these molecules are, partially at least, arranged by the mind or spirit.

If we do not accept the former theory we must accept the latter: there is no third course open to us.

If man is not an automaton, his consciousness is no mere function of any physical organ.

It is an alien and disturbing element.

Its impress on physical facts, its disturbance of physical laws, may be doubtless the only things through which we can perceive its existence; but it is as distinct from the things by which we can alone at present perceive it, as a hand unseen in the dark, that should arrest or change the course of a phosphorescent billiard-ball.