Music is a calculation which the soul makes unconsciously in secret. - Gottfried Wilhelm Leibniz

If you could blow the brain up to the size of a mill and walk about inside, you would not find consciousness.

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.

The mind is not only capable of knowing [innate ideas], but further of finding them in itself; and if it had only the simple capacity to receive knowledge…it would not be the source of necessary truths…