Later, after Castiel would gain a better understanding of what time was in context, he would remember that it was approximately fifty-six thousand years before the Fall (sixty-two thousand and a few more before the Apocalypse That Wasn’t); would only be able to note this as after because the Fall taught angels many things that they had not originally been created to know or understand.
Time itself had no real meaning when there was no concept of death, or fear, or sorrow; all of the things which mortal beings measured it with.
But that was later, and later was a concept he did not yet have in any real manner. Like all creatures with no concept of time, he lived within the present.
Most of his time was spent with Samandiriel, because there had never been a time that had not been so; much like time, Castiel had no real concept of loneliness. For all of his existence, he knew that Father loved them and wished them to sing and delight in His creations; for all of his existence, he knew that these activities were most often done with his brother.
Even when they were not occupying the same spaces, their voices blended across whatever non-meaningful distance: Holy holy holy, the Lord God Almighty--
The Song which never got old, because there was not yet such a thing as old.
Castiel was not aware of the quiet discontent on much higher tiers than his; of Lucifer’s growing jealousy, of Father’s growing indifference. Even if he was, Castiel would not have understood it.
What he knew was love, and joy, and song. What he knew was that he was an angel, a winged thing, and his only job was to sing and be joyful and love all Father made.
Samandiriel was currently watching humans -- Father’s very favorite creation -- though he was only ever a thought and songnote away from Castiel. Castiel himself was flitting along, following the shoreline of what would someday be named the Mediterranean, a flash of gold and blue and silverlight spinning and dancing in tendrils of light and the impression of wings that reflected rainbows of the sun, when he came across one of his other siblings and pulled up short.
He was not very talkative to anyone but Samandiriel -- perhaps because he was one of the last and therefore youngest and therefore just a little bit forgotten -- but Castiel had been pressed into being by Father’s will with all of the names and knowledge of his siblings coded right into his make. So, he greeted politely as he resolved his form to something more bipedal in imitation of Father’s favored and settled on the sand, harmonic voice dancing over the words in what would someday be called Enochian, “Hello, Albiel.”