Nature does not make leaps.

In symbols one observes an advantage in discovery which is greatest when they express the exact nature of a thing briefly and, as it were, picture it; then indeed the labor of thought is wonderfully diminished.

The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.

Reality cannot be found except in One single source, because of the interconnection of all things with one another.

Now where there are no parts, there neither extension, nor shape, nor divisibility is possible. And these monads are the true atoms of nature and, in a word, the elements of things.

There is no way in which a simple substance could begin in the course of nature, since it cannot be formed by means of compounding.

And there must be simple substances, because there are compounds; for the compound is nothing but a collection or aggregatum of simples.