_homo bene (male) moratus_—a moral (immoral) man.
_homo perditus_—a depraved, abandoned character.
_praecepta de moribus_ or _de virtute_—moral precepts.
_morum praecepta tradere alicui_—to give moral advice, rules of conduct.
_de virtute praecipere alicui_—to give moral advice, rules of conduct.
_mores corrupti_ or _perditi_—moral corruption (not _corruptela morum_).
_tam perditis_ or _corruptis moribus_—amongst such moral depravity.
_mores in dies magis labuntur_ (also with _ad_, e.g. _ad
mollitiem_)—immorality is daily gaining ground.
_severus morum castigator_—a stern critic of morals.
_aliquid abhorret a meis moribus_ (opp. _insitum [atque innatum] est
animo_ or _in animo alicuius_)—something is contrary to my moral
sense, goes against my principles.
_consilia et facta_ (cf. sect. X. 1, note _For "thoughts and
deeds"..._)—thought and deed.
_institutum tenere_—to remain true to one's principles.
_ratione; animi quodam iudicio_—on principle.
_vitae ratio bene ac sapienter instituta_—a sound and sensible system
of conduct.
_meae vitae rationes ab ineunte aetate susceptae_ (Imp. Pomp. 1.
1.)—the principles which I have followed since I came to man's estate.
_certas rationes in agendo_[1] _sequi_—to follow fixed principles of
conduct.
_omnia temere agere, nullo iudicio uti_—to have no principles.
_caeco impetu ferri_—to have no principles.
_natura et mores; vita moresque; indoles animi ingeniique_; or simply
_ingenium, indoles, natura, mores_—character.
_vir constans, gravis_ (opp. _homo inconstans, levis_)—a man of
character, with a strong personality.
_sibi constare, constantem esse_—to be consistent.
_animo mobili esse_ (Fam. 5. 2. 10)—to be inconsistent, changeable.
_aliquid est proprium alicuius_—something is a characteristic of a man.
_mobilitas et levitas animi_—inconsistency; changeability.
[1] Do not translate "to act, behave, conduct oneself" by _agere_
without an object or an accompanying adverb, e.g. _bene, recte agere_;
however, with the gerundive the adverb may be omitted, e.g _agendum
est, tempus agendi, celeritas in agendo_.