moral philosopher, n.All

A Moral philosopher (n.) who ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠lacks mathematics must dissect the examples of morally judging reason by repeated experiments on common understanding, separating the empirical from the rational as chemistry separates substances.

A Moral philosopher (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠like a chemist who can experiment on anyone's practical reason: add the moral law to a will tempted to lie for gain, and reason drops the advantage as acid drops lime for alkali, leaving it at the bottom to be weighed.