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WemaydistinguishgenerallybetweenpredicatingBofAbecauseitAisitself，andbecauseitissomethingelse；andparticularlybetweenplacewhichiscommonandinwhichallbodiesare，andthespecialplaceoccupiedprimarilybyeach。Imean，forinstance，thatyouarenowintheheavensbecauseyouareintheairanditisintheheavens；andyouareintheairbecauseyouareontheearth；andsimilarlyontheearthbecauseyouareinthisplacewhichcontainsnomorethanyou。
Nowifplaceiswhatprimarilycontainseachbody，itwouldbealimit，sothattheplacewouldbetheformorshapeofeachbodybywhichthemagnitudeorthematterofthemagnitudeisdefined:forthisisthelimitofeachbody。
If，then，welookatthequestioninthiswaytheplaceofathingisitsform。But，ifweregardtheplaceastheextensionofthemagnitude，itisthematter。Forthisisdifferentfromthemagnitude:
itiswhatiscontainedanddefinedbytheform，asbyaboundingplane。Matterortheindeterminateisofthisnature；whentheboundaryandattributesofaspherearetakenaway，nothingbutthematterisleft。