As thou hast sent me into the world, even so have I also sent them into the world.
The Father sent the Lord Jesus into the world to reveal the character of God to mankind. As the Lord prayed, He knew that He would soon be going back to heaven. But future generations would still need some witness concerning God. This work must be done by believers, through the power of the Holy Spirit. Of course, Christians can never represent God as perfectly as Christ did because they can never be equal with God. But believers are here just the same to present God to the world. It is for this reason Jesus sent them into the world.