1. The historical facts of this day, as well as the beautiful sermon the Holy Spirit delivered through the apostle Peter, which might appropriately be fully treated at this time, we shall leave for the special sermons on the various festivals of the year. For the present we will but briefly speak of the occasion of this festival, and of the office of the Holy Spirit.

2. The festival we call “Pentecost” had origin as follows: When God was about to lead the children of Israel out of Egypt, he permitted them to celebrate the Feast of the Passover on the night of their departure; and commanded them on every annual recurrence of the season to observe the same feast in commemoration of their liberation from bondage and their departure from Egypt. Fifty days later, in their journey through the wilderness, they arrived at Mount Sinai. There God gave them the Law, through Moses; and there they were commanded to observe annually, in commemoration of that giving of the Law, the fiftieth day after the Feast of the Passover. Hence the name “Feast of Pentecost,” the word “Pentecost” coming from the Greek “Pentecoste,” or “fiftieth day.” Our Saxons, rather more in conformity to the Greek, use the word “Pfingsten.” So we have it here of Luke: “When the day of Pentecost was now come,” or “fully come”–when the Jews had properly commemorated the giving of the Law of God on Mount Sinai–the Holy Spirit came, in accordance with Christ’s promise, and gave them a new law. We now celebrate this feast, not because of the old historical event, but because of the new one–the sending of the Holy Spirit. It is in order, then, to give a little instruction concerning the difference between our Pentecost and that of the Jews.

Watch out for the next part.

By Martin Luther.