Then, the Holy Spirit IN US is one thing, and the Holy Spirit ON US is another; and if these Christians had gone out and went right to preaching then and there, without the power, do you think that scene would have taken place on the day of Pentecost? Don't you think that Peter would have stood up there and beat against the air, while these Jews would have gnashed their teeth and mocked him? But they tarried in Jerusalem; they waited ten days. What! you say. What, the world perishing and men dying! Shall I wait? Do what God tells you. There is no use in running before you are sent; there is no use in attempting to do God's work without God's power. A man working without this unction, a man working without this anointing, a man working without the Holy Ghost upon him, is losing his time after all. So we are not going to lose anything if we tarry till we get this power. That is the object of true service, to wait on God, to tarry till we receive this power for witness-bearing. Then we find that on the day of Pentecost, ten days after Jesus Christ was glorified, the Holy Spirit descended in power. Do you think that Peter and James and John and those apostles doubted it from that very hour? They never doubted it. Perhaps some question the possibility of having the power of God now, and that the Holy Spirit never came afterward in similar manifestation, and will never come again in such power. FRESH SUPPLIES. Turn to Acts iv, 31, and you will find He came a second time, and at a place where they were, so that the earth was shaken, and they were filled with this power. The fact is, we are leaky vessels, and we have to keep right under the fountain all the time to keep full of Christ, and so have a fresh supply.