See that the governing and sovereign part of your soul is undiverted by the smooth or broken movement in the flesh, and let it not blend therewith, but circumscribe itself, and limit those affections within the (bodily) parts. But when they are diffused into the understanding by dint of that other sympathy, as needs must be in a united system, then you must not try to resist the sensation, which is natural, yet the governing part must not of itself add to the affection the judgement that it is either good or bad.