right reason, n.Definitions

Right reason (n.) pervades ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠everything; it is the common law of mankind, and it is the same as Jupiter, the manager of all existing things.

Right reason (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠simply the mind left free to work: action is right when the passions do not hinder the rational part, as a healthy body helps the soul instead of getting in its way.