…this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen Him go into heaven. – Acts 1:11

Go ye therefore and teach all nations, baptising them in the name of the Father, and of the Son, and of the Holy Ghost. – Matthew 28:19- 20

I see every reason for going down into the world and getting to work, for He is gone up into heaven and “all power is given unto Him in heaven and in earth.” Is not that a good argument-“Go ye therefore and teach all nations, baptising them in the name of the Father, and of the Son, and of the Holy Ghost”?

Our great Captain is still heading the conflict; He has ridden into another part of the field, but He will be back again, perhaps in the twinkling of an eye. You do not say that a commander has given up the campaign because it is expedient that he should withdraw from your part of the field. Our Lord is doing the best thing for His kingdom in going away. It was in the highest degree expedient that He should go, and that we should each one receive the Spirit. There is a blessed unity between Christ the King and the commonest soldier in the ranks. He has not taken His heart from us, nor His care from us, nor His interest from us: He is bound up heart and soul with His people, and their holy warfare, and this is the evidence of it, “Behold, I come quickly; and My reward is with Me, to give every man according as his work shall be.” …Do what Jesus has given you the power to do, and then ye will not stand gazing up into heaven, but you will wait upon the Lord in prayer, and you will receive the Spirit of God, and you will publish to all around the doctrine of “Believe and live.” Then when He comes He will say to you, “Well done, good and faithful servant, enter thou into the joy of thy Lord.” So may His grace enable us to do. Amen. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1817.cfm