The existence of an infinite number of causes and effects is impossible, even if these were not magnitudes; if, e.g., one Intelligence were the cause of a second, the second the cause of a third, the third the cause of a fourth, and so on, the series could not be continued ad infinitum.
Proposition IV.
Four categories are subject to change:—
(a.) Substance.—Changes which affect the substance of a thing are called genesis and destruction.
(b.) Quantity.—Changes in reference to quantity are increase and decrease.
(c.) Quality.—Changes in the qualities of things are transformations.
(d.) Place.—Change of place is called motion.
The term “motion” is properly applied to change of place, but is also used in a general sense of all kinds of changes.
Proposition V.
Motion implies change and transition from potentiality to actuality.