For since it is impossible for a created monad to have a physical influence on the inner nature of another, this is the only way in which one can be dependent on another.

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.

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.

Nihil est sine ratione. There is nothing without a reason.

Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.

There is a certain destiny of everything, regulated by the foreknowledge and providence of God in His works.

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.