But Peter continued knocking: and when they had opened the door, and saw him, they were astonished.
Ver. 16. But Peter continued knocking] He flung not away in displeasure, because not at first knock admitted. We must also continue instant in prayer. The hand of faith never knocked in vain at the gate of grace; but then, it "maketh not haste," it can willingly wait in hope of a good use and issue of all; yea, it can be content to want that particular blessing it would have; as knowing that God's people shall reap if they faint not; they shall certainly have their prayers out, either in money or money's worth.