I am convinced that the unwritten knowledge scattered among men of different callings surpasses in quantity and in importance anything we find in books, and that the greater part of our wealth has yet to be recorded.
Gottfried LeibnizBut it is the knowledge of necessary and eternal truths which distinguishes us from mere animals, and gives us reason and the sciences, raising us to knowledge of ourselves and God. It is this in us which we call the rational soul or mind.
Gottfried LeibnizIf you have a clear idea of a soul, you will have a clear idea of a form; for it is of the same genus, though a different species.
Gottfried LeibnizThus God alone is the primary Unity, or original simple substance, from which all monads, created and derived, are produced.
Gottfried Leibniz