This biblical portion shows us the great concern that our Lord Jesus Christ experienced before being arrested and crucified.

Jesus raised his eyes to heaven and told Father that the time had come; glorify your son so that your son also glorifies you. In the middle of this prayer that Jesus did was not for him, but for his disciples, Jesus made it clear to the Father that his request was for his disciples, not for the world, but for these men that he had given him, asking He will keep it in his name so that they may learn to be one, just as the Father and the Son are.
Jesus continues his prayer and asks the Father to keep them from evil and sanctify them in the truth that is his word.
But Jesus thought not only of his disciples, but also of all those who should believe in him, by his word. Jesus' greatest desire is to see us united. He says that they are all one as are the Son and the Father.
God loves unity and it is established in the book of Psalms, specifically in Psalm 133: 1, that it is good and pleasant that we all be together and in harmony.