Nothing could be clearer than the fact that our Lord “showed Himself alive after His passion by many infallible proofs, being seen of them forty days and speaking of the things pertaining to the kingdom of God” (Acts 1:3). In those forty days then, one Person, our Lord, spoke to eleven men, and gave instructions as to the program they were to carry out after His ascension. In every single case it is crystal clear that these commands were not directed to others, who were to live at some future date, but to the apostles, who were to commence to carry them out after His departure, when the Holy Spirit had endued them with power.
This is emphasized by the phraseology found in all five records of the so-called “Great Commission”: Matt. 28:19: “Go ye,” Mark 16:15: “Go ye,” Luke 24:48: “Ye are witnesses,” John 20:21: “So send I you,” and Acts 1:8: “Ye shall be witnesses.” How preposterous, then, to argue, as so many hard-pressed theologians have done, that one or more segments of the great commission are to be carried out by another generation at a later time!
By what rule of hermeneutics or logic have we the right to exclude from the interpretation of these commands the very persons to whom our Lord gave them, and if this commission is binding on the Church today, what authority have we to choose which part or parts we shall obey? source