How Can One Man Possibly Do God's Work?

Exodus 4:27-31

27 The Lord said to Aaron, “Go into the wilderness to meet Moses.” So he met Moses at the mountain of God and kissed him. 

28 Then Moses told Aaron everything the Lord had sent him to say, and also about all the signs he had commanded him to perform.

29 Moses and Aaron brought together all the elders of the Israelites, 

30 and Aaron told them everything the Lord had said to Moses. He also performed the signs before the people, 

31 and they believed. And when they heard that the Lord was concerned about them and had seen their misery, they bowed down and worshiped.