For as the compound idea of extension, which is real, is composed of such ideas; were these so many non-entities, there would be a real existence composed of non-entities; which is absurd.
Here therefore I must ask, What is our idea of a simple and indivisible point?
No wonder if my answer appear somewhat new, since the question itself has scarce ever yet been thought of.

We are wont to dispute concerning the nature of mathematical points, but seldom concerning the nature of their ideas.
The idea of space is conveyed to the mind by two senses, the sight and touch; nor does anything ever appear extended, that is not either visible or tangible.

That compound impression, which represents extension, consists of several lesser impressions, that are indivisible to the eye or feeling, and may be called impressions of atoms or corpuscles endowed with colour and solidity.

But this is not all.

It is not only requisite, that these atoms should be coloured or tangible, in order to discover themselves to our senses; it is also necessary we should preserve the idea of their colour or tangibility in order to comprehend them by our imagination.