If you could blow the brain up to the size of a mill and walk about inside, you would not find consciousness. - Gottfried Wilhelm Leibniz

Now, as there is an infinity of possible universes in the Ideas of God, and as only one of them can exist, there must be a sufficient reason for God's choice, which determines him toward one rather than another. And this reason can be found only in the fitness, or the degrees of perfection, that these worlds contain, since each possible thing has the right to claim existence in proportion to the perfection it involves.

This miracle of analysis, this marvel of the world of ideas, an almost amphibian object between Being and Non-being that we call the .

The present state of a single substance is the natural result of its precedent state, so much so that the present is pregnant with the future.