30 8 The soul necejsarily livings

action. Which ever way it be that the soulaffects the body, when first he takes the hold,it continues still to affect it the fame way, allthe time till he lets it go. The animal spirits,which are, probably, the immediate ministersof the will, crowd incessantly into the sameparts, and there is incessantly the fame tume-faction, or contraction of the muscles, whichare the instruments of this action, as at first*The matter is not much different in thinking 1to keep an object under consideration, is thesame thing as a constant attention, or appli-cation of the perceptive faculty to it; and thisis effected by constant willing. Just as lookingstedfastlyupon one point, requires a constantdirection of the axes of vision to that point?which must be effected by constantly exertingthat power, which the foul hath over the mo-tion of these axes. When we are sick, ° shave a head-ach, it is with pain we can per-form this for any time, which shews it to b eaction. The property of matter, wherebycontinues in that state into which it is on ceput, proceeding from its want of power t°work a change, is by no means appliedhere; and it is our prejudice, to call thest ion only of the perceptive capacity, from ° n ^