"It would not be impossible to learn, should you wish. However, Hythlodaeus or Emet-Selch would be better suited to judging how much you possess. My sight is not so keen as theirs."

He is more than willing to teach, certainly. But he is not the best judge of how much aether any one person should happen to possess. Still, neither does he dwell on the idea overmuch. Should Ignis wish to follow up on the suggestion he is free to do so, and if not it matters little enough to Lahabrea.

Instead there's a nod at the question.

"I would accept tea, should you wish to offer."