So also with regard to our power of moving, or directing motion by will and choice; upon the destruction of a limb, this active power evidently remains, unlessened; so that the living being, who has suffered this loss, would be capable of moving as before, if it had another limb to move with. It can walk by the help of an artificial leg. It can make use of a pole or a lever, to reach towards itself and to move things, beyond the length and the power of its arm; and this it does in the same manner as it reaches and moves, with its natural arm, things nearer and of less weight. Nor is there so much as any appearance of our limbs being endued with a power of moving or directing themselves; though they are adapted, like the several parts of a machine, to be the instruments of motion to each other; and some parts of the same limb, to be instruments of motion to the other parts. Thus a man determines that he will look at an object through a microscope; or being lame, that he will walk to such a place with a staff, a week hence. His eyes and his feet no more determine in these cases, than the microscope and the staff. Nor is there any ground to think they any more put the determination in practice; or that his eyes are the seers, or his feet the movers, in any other sense than as the microscope and the staff are. Upon the whole, then, our organs of sense, and our limbs, are certainly _instruments_,[36] which the living persons ourselves make use of to perceive and move with: there is not any probability, that they are any more; nor consequently, that we have any other kind of relation to them, than what we have to any other foreign matter formed into instruments of perception and motion, suppose into a microscope or a staff; (I say any other kind of relation, for I am not speaking of the degree of it) nor consequently is there any probability, that the alienation or dissolution of these instruments, is the destruction of the perceiving and moving agent. And thus our finding that the dissolution of matter, in which living beings were most nearly interested, is not their dissolution; and that the destruction of several of the organs and instruments of perception and of motion belonging to them, is not their destruction; shows demonstratively, that there is no ground to think that the dissolution of any other matter, or destruction of any other organs and instruments, will be the dissolution or destruction of living agents, from the like kind of relation. And we have no reason to think we stand in any other kind of relation to any thing which we find dissolved by death.