God makes nothing without order, and everything that forms itself develops imperceptibly out of small parts.

I also readily admit that there are animals, taken in the ordinary sense, that are incomparably larger than those we know of, and I have sometimes said in jest that there might be a system like ours which is the pocketwatch of some enormous giant.

Either there are no corporeal substances, and bodies are merely phenomena which are true or consistent with each other, such as a rainbow or a perfectly coherent dream, or there is in all corporeal substances something analogous to the soul.

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.

Philosophy consists mostly of kicking up a lot of dust and then complaining that you can't see anything.

There are also two kinds of truths: truth of reasoning and truths of fact.

The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.