Did I show you the particular causes of each individual in a collection of twenty particles of matter, I should think it very unreasonable, should you afterwards ask me, what was the cause of the whole twenty.

This is sufficiently explained in explaining the cause of the parts.
Though the reasonings which you have urged, CLEANTHES, may well excuse me, said PHILO, from starting any further difficulties, yet I cannot forbear insisting still upon another topic.

It is observed by arithmeticians, that the products of 9, compose always either 9, or some lesser product of 9, if you add together all the characters of which any of the former products is composed.

Thus, of 18, 27, 36, which are products of 9, you make 9 by adding 1 to 8, 2 to 7, 3 to 6.

Thus, 369 is a product also of 9; and if you add 3, 6, and 9, you make 18, a lesser product of 9.