Whether an angel merits his beatitude?

Objections

Objection 1 : It would seem that the angel did not merit his beatitude. For merit arises from the difficulty of the meritorious act. But the angel experienced no difficulty in acting rightly. Therefore righteous action was not meritorious for him.
Objection 2 : Further, we do not merit by merely natural operations. But it was quite natural for the angel to turn to God. Therefore he did not thereby merit beatitude.
Objection 3 : Further, if a beatified angel merited his beatitude, he did so either before he had it, or else afterwards. But it was not before; because, in the opinion of many, he had no grace before whereby to merit it. Nor did he merit it afterwards, because thus he would be meriting it now; which is clearly false, because in that case a lower angel could by meriting rise up to the rank of a higher, and the distinct degrees of grace would not be permanent; which is not admissible. Consequently the angel did not merit his beatitude.