For, above all, I hold a notion of possibility and necessity according to which there are some things that are possible, but yet not necessary, and which do not really exist. From this it follows that a reason that always forces a free mind to choose one thing over another (whether that reason derives from the perfection of a thing, as it does in God, or from our imperfection) does not eliminate our freedom.
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 LeibnizMusic is a hidden arithmetic exercise of the soul, which does not know that it is counting.
Gottfried Leibniz