I don't ever expect to know. [Centuries have passed, and yet Celestia knows keenly how very imperfect she is. Her flaws loom all the larger for her virtues, in fact.]

[Of course, directly telling Hibiki that perfection is impossible and she's far from it would be phenomenally rude, but perhaps she'll hear wisdom in Celestia's own self-acknowledgment. (Celestia doesn't expect it, mind.)]

It is something I would like to understand. I have seen ponies elevated to the status of alicorn, and know something of what it means to them.