If someone should now ask why we are, by nature, so inclined to divide quantity, I shall answer that we conceive quantity in two ways: abstractly, or superficially, as we commonly imagine it, oras substance, which is done by the intellect alone without the help of the imagination. So if we attend to quantity as it is in the imagination, which we do often and more easily, it will be found to be finite, divisible, and composed of parts; but if we attend to it as in the inteelect, and conceive of it insofar as it is a substance, which happens seldom and with great difficulty, then (as we have already sufficiently demonstrated) it will be found to be infinite, unique, and indivisible.

- Baruch Spinoza