3 During the forty days after he suffered and died, he appeared to the apostles from time to time, and he proved to them in many ways that he was actually alive. And he talked to them about the Kingdom of God. 4 Once when he was eating with them, he commanded them, “Do not leave Jerusalem until the Father sends you the gift he promised, as I told you before. 5 John baptized with water, but in just a few days you will be baptized with the Holy Spirit.” — Acts 1:3-5 NLT
Jesus spent forty days on earth after His resurrection. He would often appear to the apostles and talk with them, giving them further instructions about what they should do and how they should do it. The most important instruction was not to leave Jerusalem until they had been baptized with the Holy Spirit. That instruction is still just as important to God’s children today. When God calls us to do something specific for the Kingdom, we should immerse ourselves in prayer and wait for the moving of the Holy Spirit before we attempt anything. The reason for this is that we are merely mouths, hands and feet for God, He will accomplish the work to be done. What God speaks to us, we speak to others. We take the message wherever He instructs us to take it and we minister to those who He puts in our path. That is how the message gets to the ends of the world. We are carriers, He is the activator. The reuslts are not in our hands, they are in His hands. We are to be concerned about being obedient and God will take care of the results.