And this happens because in none of these things that is found for which search is made, and as we live on we seek further.

Wherefore it is possible to see that one desirable thing stands under the other in the eyes of our Soul in a way almost pyramidal, for the least first covers the whole, and is as it were the point of the desirable good, which is God, at the basis of all; so that the farther it proceeds from the point towards the basis, so much the greater do the desirable good things appear; and this is the reason why, by acquisition, human desires become broader the one after the other.
But, thus this pathway is lost through error, even as in the roads of the earth; for as from one city to another there is of necessity an excellent direct road, and often another which branches from that, the branch road goes into another part, and of many others some do not go all the way, and some go farther round; so in Human Life there are different roads, of which one is the truest, and another the most misleading, and some are less right, and some less wrong.

And as we see that the straightest road to the city satisfies desire and gives rest after toil, and that which goes in the opposite direction never satisfies and never can give rest, so it happens in our Life.

The man who follows the right path attains his end, and gains his rest.

The man who follows the wrong path never attains it, but with much fatigue of mind and greedy eyes looks always before him.
Wherefore, although this argument does not entirely reply to the question asked above, at least it opens the way to the reply, which causes us to see that each desire of ours does not proceed in its expansion in one way alone.