The monad, of which we shall speak here, is nothing but a simple substance which enters into compounds; simple, that is to say, without parts.

[Alternate translation:] The Divine Spirit found a sublime outlet in that wonder of analysis, that portent of the ideal world, that amphibian between being and not-being, which we call the imaginary root of negative unity.

We may say, that not only the soul (the mirror of an indestructible universe) is indestructible, but also the animal itself is, although its mechanism is frequently destroyed in parts.

There are also two kinds of truths, those of reasoning and those of fact. Truths of reasoning are necessary and their opposite is impossible, and those of fact are contingent and their opposite is possible. When a truth is necessary its reason can be found by analysis, resolving it into more simple ideas and truths until we reach those which are primitive.

Everything that is possible demands to exist.

To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.

It's easier to be original and foolish than original and wise.