Music is a secret and unconscious mathematical problem of the soul.

He who hasn't tasted bitter things hasn't earned sweet things.

It is worth noting that the notation facilitates discovery. This, in a most wonderful way, reduces the mind's labour.

If 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.

It is God who is the ultimate reason things, and the Knowledge of God is no less the beginning of science than his essence and will are the beginning of things.

To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.