I 8 A VIS I NERTI AE

a velocity as a 1000 times C, it will moveon with that velocity; which state of moti-on is now as much to be considered as itsstate, as the former rest was: and it will justresist as much to be moved with a velocityas 2000 times C, or to have the velocity Canother thousand times increased, as it didat first j or to be brought back again, frommoving with the velocity 1000 C, to rest,as it did to be brought from rest to movewith that velocity. In a word, as long asa change is pojjible, which is always and end-lessly, so long mujl it resist-, and it must resjiequal changes equally : which was exactly theresistance it was endued with, before anychange was effected in it at all, and beforeany force was impressed upon it at all. Sothat this resistance cannot be impaired, aug-mented, or any way altered, by any newforce impressed ab extra . Which is alreadya strong symptom that resistance to a changeof its state is of the nature of matter, as in-separable from it as solidity or extension ;since as long as the solid extension, that isthe quantity of matter, in the body A, re-mains the same, this immutability of its resis-tance must be supposed, if it is at all resist-ing matter. 4 XIV. But