كل حالة راهنة لجوهر بسيط هي النتيجة الطبيعية لحالته السابقة، بحيث يكون حاضره حبلى بمستقبله.

“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.”Gottfried Leibniz — The Rationalists: Descartes: Discourse on Method & Meditations; Spinoza: Ethics; Leibniz: Monadolo gy & Discourse on Metaphysics (2011)