Luke's gospel was taken up with Christ in the body, Acts with Christ in the church. In Luke we read of what Christ did in His humiliation, and in Acts what He did in His exaltation. With most men, their work stops at their death, but with Christ it had only begun. "Greater works than these shall ye do, because I go to My Father." We call this book the "Acts of the Apostles," but it is really the "Acts of the Church (Christ's body)." You will find the key to the book in chapter 1:8: "But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth." We would not have seen the struggles of that infant church if it had not been for Luke. We would not have known much about Paul either if it had not been for Luke. There were four rivers flowing out of Eden; here we have the four gospels flowing into one channel. Three divisions of the Acts:-- I. Founding of the church. II. Growth of the church. III. Sending out of missionaries. I believe that the nearer we keep to the apostles' way of presenting the gospel, the more success we will have. Now there are ten great sermons in Acts, and I think if you get a good hold on these you will have a pretty good understanding of the book and how to preach. Five were preached by Peter, one by Stephen and four by Paul. The phrase, "We are witnesses," runs through the entire book. We say, to-day, "We are eloquent preachers." We seem to be above being simple witnesses. I. Peter's sermon on the day of Pentecost. Someone said that now it takes about three thousand sermons to convert one Jew, but here three thousand were converted by one sermon. When Peter testified of Christ and bore witness that he had died and had risen again, God honored it, and he will do the same with you. II. Peter preaches in Solomon's porch. A short sermon, but it did good work. They did not get there till three o'clock, and I believe the Jews could not arrest a man after sundown, and yet in that short space of time five thousand were converted. What did he preach? Listen: "But ye denied the Holy One and the Just, and desired a murderer to be granted unto you; And killed the Prince of Life, whom God hath raised from the dead: whereof we are witnesses. Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord." III. Peter preaches to the high priests. They had arrested them and were demanding to know by what power they did these things. "By the name of Jesus Christ, . . . doth this man stand here before you whole." When Bunyan was told he would be released if he would not preach any more, he said, "If you let me out I will preach to-morrow."