2:17 in the last days. This “last days” prophecy of Joel was fulfilled at Pentecost only in a precursive sense. Its complete fulfillment must await the time of the end (see its continuation in Joel 3). Thus Peter’s statement: “This is that” (Acts 2:16) should be understood in the sense of “This is like that.”

2:21 whosoever shall call. This application of Joel’s prophecy, as found in Joel 2:32, is valid in both its precursive and final fulfillments. See also Paul’s use of it in Romans 10:13.