There has been an antagonism of philosophy to theology since the middle 1700s. In Romans this antagonism is not suggested. Rather they suggest building blocks of an ethic based on God's revelation that is consistent with an understanding of philosophy. Moral and intellectual virtues constitute human happiness and are not to be understood merely as means to achieve happiness. Some understanding of conscience is a common reflection throughout the history of Christian thought.
Most people think that living well and doing well are the same as happiness.
Some activities are choiceworthy for some other end and some are choiceworthy in themselves. Study seems to be liked in itself alone because it has no other result than being studied. The person whose activity expresses understanding and who takes care of understanding would seem to be in the best condition, and most loved by the gods. The ultimate felicity of humans doesn't consist in moral actions. All laws have the precepts of one character in that they flow from the first precept.