Whether one angel enlightens another?

Objections

Objection 1 : It would seem that one angel does not enlighten another. For the angels possess now the same beatitude which we hope to obtain. But one man will not then enlighten another, according to Jer. 31:34: "They shall teach no more every man his neighbor, and every man his brother." Therefore neither does an angel enlighten another now.
Objection 2 : Further, light in the angels is threefold; of nature, of grace, and of glory. But an angel is enlightened in the light of nature by the Creator; in the light of grace by the Justifier; in the light of glory by the Beatifier; all of which comes from God. Therefore one angel does not enlighten another.
Objection 3 : Further, light is a form in the mind. But the rational mind is "informed by God alone, without created intervention," as Augustine says (Questions. 83, qu. 51). Therefore one angel does not enlighten the mind of another.