John 7:39

This spake he of the Spirit, which they that believe on him should receive.

This declaration of John makes the second chapter of Acts the best commentary on the preceding verse. Luther says: "So St. Peter, by one sermon on the day of Pentecost, as by. rushing of water, delivered three thousand men from the devil's kingdom, washing them in an hour from sin, death and Satan."

Because Jesus was not yet glorified.

Let it be noted, 1. That the Holy Spirit was not given until after the death and ascension of Jesus. 2. The disciples of Christ did not become "fountains of living water" until the Holy Spirit was sent. This marks Pentecost as the beginning of the preaching of the gospel authoritatively by his disciples. The sermon of Peter was the first sermon under the great Commission, the first declaration of the conditions of the gospel, the first preaching by men as "the Holy Spirit gave them utterance." It was only after Jesus was glorified that he could send the Holy Spirit, and on Pentecost it was declared, "He hath shed forth the things which you do see and hear."