Jesus did not just come on earth to give us eternal life, rather he came to give us God’s kind of life. The need of God is to see his glory feel the earth, to see Jesus revealed and glorified, and the only entity that can make that need to come to pass is man, so as powerful as God is, he invested such trust in man.
So through you, the glory of God will fill the earth, through you the name of Jesus will be proclaimed in many nations of the world.