Thomas Aquinas (1225–1274) Italian Dominican scholastic philosopher of the Roman Catholic Church
Original: (la) Lex naturae […] nihil aliud est nisi lumen intellectis insitum nobis a Deo, per quod cognoscimus quid agendum et quid vitandum. Hoc lumen et hanc legem dedit Deus homini in creatione.
Source: On the Ten Commandments (c. 1273) Art. 1