senses and the objects, the endeavour of the objects pressing one way, and the senses pressing the other way, and if equal in their strengths, they would make a stop, and the sensitive organs would be very much pained. Truly, _Madam_, in my opinion, it would be like that Custom which formerly hath been used at _Newcastle_, when a man was married, the guests divided themselves, behind and before the Bridegroom, the one party driving him back, the other forwards, so that one time a Bridegroom was killed in this fashion; But certainly Nature hath a more quick and easie way of giving intelligence and knowledg to her Creatures, and doth not use such constraint and force in her actions; Neither is sense or sensitive perception a meer Phantasme or Idea, but a Corporeal action of the sensitive and rational matter, and according to the variation of the objects or patterns, and the sensitive and rational motions, the perception also is various, produced not by external pressure, but by internal self-motion, as I have declared heretofore; and to prove, that the sensitive and rational corporeal motions are the onely cause of perception; I say, if those motions in an animal move in another way, and not to such perceptions, then that animal can neither hear, see, taste, smell nor touch, although all his sensitive organs be perfect, as is evident in a man falling into a swoon, where all the time he is in a swoon, the pressure of the objects is made without any effect; Wherefore, as the sensitive and rational corporeal motions make all that is in nature; so likewise they make perception, as being perception it self, for all self-motion is perception, but all perception is not animal perception; or after an animal way; and therefore sense cannot decay nor die, but what is called a decay or death, is nothing else but a change or alteration of those Motions. But you will say, _Madam_, it may be, that one body, as an object, leaves the print of its figure, in the next adjoyning body, until it comes to the organ of sense, I answer that then soft bodies onely must be pressed, and the object must be so hard as to make a print, and as for rare parts of matter, they are not able to retain a print without self-motion; Wherefore it is not probable that the parts of air should receive a print, and print the same again upon the adjoyning part, until the last part of the air print it upon the eye; and that the exterior parts of the organ should print upon the interior, till it come to the centre of the Brain, without self-motion. Wherefore in my opinion, Perception is not caused either by the printing of objects, nor by pressures, for pressures would make a general stop of all natural motions, especially if there were any reaction or resistence of sense; but according to my reason, the sensitive and rational corporeal motions in one body, pattern out the Figure of another body, as of an exterior object, which may be done