After the enumeration, then, of so many and so important names of orders and offices, underlying which it is certain that there are personal existences, let us inquire whether God, the creator and founder of all things, created certain of them holy and happy, so that they could admit no element at all of an opposite kind, and certain others so that they were made capable both of virtue and vice; or whether we are to suppose that He created some so as to be altogether incapable of virtue, and others again altogether incapable of wickedness, but with the power of abiding only in a state of happiness, and others again such as to be capable of either condition. (Book I, Chapter 5, Part 3)

What is the nature of the moral universe?

Can rationality ever be separated from choice?

Can the power to choose avoid the possibility of error?

Is rationality, fully developed, sufficient for virtue?

Is virtue a source of - or challenge to - happiness?