In a moralistic manner.

Characteristic of or relating to a narrow-minded concern of the morals of others; self-righteous

The study of morals. / A moralizing approach or attitude.

(derogatory) One who bases all decisions on perceived morals, especially one who enforces them with censorship. / A teacher of morals; a person who studies morality; a moral philosopher.

plural of moralist

A diffuse notion of theism and morality, which need not be tied to any particular religious creed, found to be common among early 21st-century US American teenagers.