You can keep the body as well-oiled and receptive as possible, but whether you’re actually going to be able to go for the long haul is really not your own choice.
The spirit desires to remain with its body, because, without the organic instruments of that body, it can neither act, nor feel anything.[L’anima desidera stare col suo corpo, perchè sanza li strumenti organici di tal corpo nulla può operare nè sentire.]
The mass of a body is a measure of its energy content.[Die Masse eines Körpers ist ein Maß für dessen Energiegehalt.]
The boundaries of bodies are the least of all things.[Li termini delli corpi sono la minima cosa di tutte le cose.]
The body regulates the soul, and, like the balance-wheel, it is submitted to regular oscillations.[Le corps vient-il régler l’âme, et, comme le balancier, est-il soumis à des oscillations régulières.]