And that he might make known the riches of his glory on the vessels of mercy, which he had before prepared unto glory,
All Commentaries on Romans 9:23 Go To Romans 9
Augustine of Hippo
AD 430
In giving to some what they did not deserve God obviously wanted his grace to be gratuitous and therefore genuinely grace, and in not giving it to all he showed what all deserved. He is good in the benefit given to certain people and just in the punishment of others but good in all things, for it is good when that which is deserved is given, and just in all things, as it is just when that which is not merited is given without injury to anyone.