David’s words could be interpreted as a request, Let me be satisfied,
which would be a prayer for David’s future hope to be realized. Or he could be saying with simple certainty, I shall be satisfied.
Either way, he knows satisfaction will come when he awakes with
or in
God's likeness.
15 As for me, I shall behold your face in righteousness; when I awake, I shall be satisfied with your likeness.