Nothing is more important than to see the sources of invention which are, in my opinion more interesting than the inventions themselves. Gottfried Leibniz More Quotes by Gottfried Leibniz More Quotes From Gottfried Leibniz It follows from what we have just said, that the natural changes of monads come from an internal principle, since an external cause would be unable to influence their inner being. Gottfried Leibniz changes being influence said It can have its effect only through the intervention of God, inasmuch as in the ideas of God a monad rightly demands that God, in regulating the rest from the beginning of things, should have regard to itself. Gottfried Leibniz rest beginning god ideas