XVIII. What portion soever, either of air or fire there be in thee, although by nature it tend upwards, submitting nevertheless to the ordinance of the universe, it abides here below in this mixed body.

So whatsoever is in thee, either earthy, or humid, although by nature it tend downwards, yet is it against its nature both raised upwards, and standing, or consistent. So obedient are even the elements themselves to the universe, abiding patiently wheresoever (though against their nature) they are placed, until the sound as it were of their retreat, and separation. Is it not a grievous thing then, that thy reasonable part only should be disobedient, and should not endure to keep its place: yea though it be nothing enjoined that is contrary unto it, but that only which is according to its nature? For we cannot say