Success factors of preaching:

1. The Holy Spirit led the ministry:
Before His ascension, the Lord Jesus commanded His disciples not to depart from Jerusalem, but to wait for the Promise of the Father. The reason for that was declared by the Lord, that they will receive power when the Holy Spirit has come upon you (Act1:4,8). These words are considered a warning for them if they departed from Jerusalem before receiving this power… why? Because the Holy Spirit, since the foundation of the church, will be everything in the church of the New Testament; He will be the Leader, the Counselor, the Helper, the Guidance, the Comforter, and the Worker into the preachers, the listeners and the believers. We could see the influence of the Holy Spirit in the church of the apostles by considering this:
•    The Spirit of God was inviting to the ministry (Act13:2)
•    He was teaching the servants and talking from their mouths (Act4:7-12 compared with Mark13:11; John16:13; 1Cor2:4,5,10,13)
•    He chose their areas of preaching, so He directed them to go to one place and prevent them from going to another (Act8:26-29; 10:19,20; 16:6-10)
•    He sometimes transferred them from one place to another (Act8:39-40)
•    He made miracles and wonders through them (Act5:9,10; 13:9-11)
•    And He was guiding the church as congregation and individuals as well (Act15:28)
Thus we shouldn’t wonder that the early church insisted that the condition for ministry is to be filled with the Spirit. This was obvious in choosing the seven deacons by the congregation as they were “full of the Holy Spirit and wisdom” (Act6:3)

2. Preaching the religion of spirit and power:
Christianity proved, through its preaching activity that it is the religion of spirit and power. It doesn’t mean the spiritual teachings and morals given to the world or spiritual way of life, but the strength of its message and its effect on the souls. For example Peter’s sermon in Pentecost was a short and simple one but its effect was marvelous (Act2:37; 1Cor2:1-5). This proves the words of the Lord of glory, “When they arrest you and deliver you up, do not worry beforehand, or premeditate what you will speak… for it is not you who speak, but the Holy Spirit” (Mark13:11). These words were proven during St. Stephen’s trial, when those who tried to argue with him, were not able to resist the wisdom and the Spirit by which he spoke (Act6:10). Now we could understand St. Paul’s words, “For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe” (1Cor1:21). This indicates that Christianity, for its spread, didn’t depend on intellectual methods to convince, but the proof for the truth of its message was, and is still, the proof of Spirit and wisdom.
The preaching of the Spirit was accompanied by the power of the Spirit through wonders and miracles (Heb2:3,4)… including healing the sick, and casting out demons in the name of the Lord Jesus; about which, the book of Acts has mentioned many examples.

3. Preaching the gospel of salvation:
The gospel preached by Our Lord Jesus was the way redemption and salvation. And when He said upon the cross, “It is finished”, it means that He finished His work as a Savior and a Healer. Truly, He appeared, among His people, as a Physician… “Those who are well have no need of a physician, but those who are sick” (Mark2:17; Luke5:31). The first three gospels revealed Him as a Physician for both spirit and body, and as a Savior or a Healer for mankind. Thus we read that He “went about all the cities and villages, teaching in their synagogues, preaching the gospel of kingdom, and healing every sickness and every disease among the people. But when He saw the multitudes, he was moved with compassion for them, because they were weary and scattered, like sheep having no shepherd. Then He said to His disciples, “The harvest truly is plentiful, but the laborers are few” (Matthew9:35-37). Here we notice that the Lord linked the physical disease with the spiritual one… considering them as two different expressions for the only great human illness. It was easier for Him to say to the ill “Rise up and walk”, but He said, “Man, your sins are forgiven you” (Luk5:18-25). He didn’t reject or separate Himself from the sinners according to the Jewish Pharisee concept at His time; but rather His attitude was strange for the Jews, who accused Him because He was eating with tax collectors and sinners. Those people surrounded Him were cured by Him from the sickness of the body and spirit. This is the case during His incarnation, and when He was crucified, He revealed His mighty power for salvation in its utmost greatness, even for those who didn’t sea Him in the flesh. “Who Himself bore our sins in His own body on the tree, that we, having died to sins, might live for righteousness- by whose stripes you were healed” (1Pet2:24). This is the new truth that shines from the cross, and the fountain of purification which comes from it.
The apostles and disciples went to preach the good news of the Divine Savior; and the healing Physician, whose life, deeds and death were for the salvation of humans (Luk2:11; Jhn4:42; Tit3:4,6). These meanings moved St. Paul to say to the Galatians, “… who loved me and gave Himself for me.” (Gal2:20), and to say also to Titus, “For the grace of God that brings salvation has appeared to all men… who gave Himself for us, that He might redeem us from every lawless deed and purify for Himself His own special people zealous for good works” (Tit2:11-14). This is the truth declared by the apostles of our Lord Jesus Christ from the beginning; as St. Peter said before the Jewish Sanhedrin, “Nor is there salvation in any other, for there is no other name under heaven given among men by which we must be saved” (Act4:12), and for that, St. Paul wonders, “How shall we escape if we neglect so great a salvation, which at the first began to be spoken by the Lord, and was confirmed to us by those who heard Him” (Heb2:3)…
The whole creation was groaning, and was eagerly waiting for a savior… the Jews utters the words of the paralyzed of Bethesda “I have no man” (Jhn5:7); and the Gentiles utters the words of the Macedonian man who appeared in a vision to St. Paul saying, “Come over … and help us” (Act16:9)… these feelings helped the Christian preachers.