Whether obedience is the greatest of the virtues?

Objections

Objection 1 : It seems that obedience is the greatest of the virtues. For it is written (1 Kgs. 15:22): "Obedience is better than sacrifices." Now the offering of sacrifices belongs to religion, which is the greatest of all moral virtues, as shown above (Question [81], Article [6]). Therefore obedience is the greatest of all virtues.
Objection 2 : Further, Gregory says (Moral. xxxv) that "obedience is the only virtue that ingrafts virtues in the soul and protects them when ingrafted." Now the cause is greater than the effect. Therefore obedience is greater than all the virtues.
Objection 3 : Further, Gregory says (Moral. xxxv) that "evil should never be done out of obedience: yet sometimes for the sake of obedience we should lay aside the good we are doing." Now one does not lay aside a thing except for something better. Therefore obedience, for whose sake the good of other virtues is set aside, is better than other virtues.