Message 63:7
I come that this work might be. That the gospel may be fully established and the plan of God be carried to the ends of the earth. That salvation may come to all who will hear the Christ in his plea that whosoever will may come, for it is his words that shall judge all men at the last day.
The Lord is sending John to earth to instruct us on our missing of spreading the gospel to the ends of the earth. This is our primary responsibility in our work for the Lord. In order for people to hear the gospel we must take it to them.