Might be your best, most honest response to Jesus. Sometimes he just says things that don’t make sense. At least not yet. And sometimes he repeats those nonsensical things, as if by saying it again you’re going to magically catch on.
Maybe you will. Maybe you won’t.
Instead of forcing an explanation, out of some unhealthy pressure to look like a good Christian or to look really clever, I suggest two things:
First, ask a followup question. Directly to Jesus in prayer, and also to other disciples who might have a clue.
Second, if that still doesn’t help much, shrug your shoulders and keep on following him. Whatever is clear to you matters more than whatever remains obscure.