Kant's Thoughts On Bodies

Kant defines a body as, "matter between determinate boundaries." Kant conceives of the phenomenal world of bodies in terms of the correlated concepts of matter and motion. "Matter is the movable insofar as it fills a space. To fill a space means to resist everything movable that strives by its motion to press into a certain space." He says that as an object extended in space, resists other bodies by forces of repulsion, therefore no two bodies can fill the same space at the same time. So he says, "The concept of matter is reduced to nothing but moving forces."