Most assuredly, I say to you, he who believes in Me, the works that I do he will do also; and greater works than these he will do, because I go to My Father. John 14:12
Recommended Reading – John 14:25-31
The world’s population was around 200 million in the first century. For Jesus to reach all those people individually would have been humanly impossible. Even with the assistance of 12 helpers (Luke 9:1), even with 70 helpers (Luke 10:1), human limitations would have caused the Great Commission to fail.
Jesus lived His life by the power and wisdom of the Holy Spirit, who was given to Him by the Father without limit (John 3:34). No number of men and women operating in their own strength could accomplish the Great Commission in their own fleshly power. So Jesus returned to heaven and sent the Holy Spirit to fill and empower His helpers so they could do even greater works (more works) than Jesus Himself did in His three years of ministry on earth. Indeed, He said it was to His disciples’ advantage that He should leave them and send the Holy Spirit in His place (John 16:7).
If you are facing a task you feel is impossible, remember that Jesus sent His Spirit to enable you to do what He Himself would do if He were here—and more.
The Christian is called upon to live a supernatural life, and he has been given the power to live that life.
Donald Grey Barnhouse