17 “And now, brothers and sisters, I know that you acted in ignorance, as did also your rulers. 18 In this way God fulfilled what he had foretold through all the prophets, that his Messiah[a] would suffer. 19 Repent, therefore, and turn to God so that your sins may be wiped out, 20 so that times of refreshing may come from the presence of the Lord and that he may send the Messiah[b] appointed for you, that is, Jesus, 21 who must remain in heaven until the time of universal restoration that God announced long ago through his holy prophets.