In this message we see Jesus as the first Missionary sent by God, with a clear responsibility for those chosen by God. We also see that the Gospel is not complete here on earth, but is focused on eternal life.
English Standard Version
38 For I have come down from heaven, not to do my own will but the will of him who sent me. 39 And this is the will of him who sent me, that I should lose nothing of all that he has given me, but raise it up on the last day. 40 For this is the will of my Father, that everyone who looks on the Son and believes in him should have eternal life, and I will raise him up on the last day.”