Form can only be destroyed accidentally, i.e., on account of its connexion with substance, the true nature of which consists in the property of never being without a disposition to receive form.

When man possesses a good, sound body that does not overpower him nor disturb the equilibrium in him, he possesses a divine gift. In short, a good constitution facilitates the rule of the soul over the body, but it is not impossible to conquer a bad constitution by training.

Man's shortcomings and sins are all due to substance of the body and not to its form, while all his merits are exclusively due to his form.

Maimonides Quotes