The eleven disciples went to Galilee, to the mountain to which Jesus had ordered them. When they saw him, they worshiped, but they doubted. Then Jesus approached and said to them, "All power in heaven and on earth has been given to me. Go, therefore, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, until the end of the age." (Mt 28:16-20)
The disciples went back to Galilee. As the disciples started their journey from Galilee to Jerusalem so now they start their journey again (after resurrection) from Galilee. This is to show that one has to start one’s journey from his own place of origin. He has to start from his place of origin and journey towards Jerusalem. Everyone has got his own Galilee and everyone has to begin his journey from there.
They met Jesus on a mountain. Mountain is the place where God dwells. Mountain is the place of revelation (Sinai, Tabor, Zion etc). After resurrection Jesus revealed himself to the disciples on a mountain. The disciples also worshiped him. Jesus was accepted as God and worshiped on a mountain.
Jesus affirms his Godhead (all power in heaven and on earth has been given to me); commissions them (go therefore and make disciples) to baptize them and teach them; and assures them of his continual presence till the end of days. He takes the role of god among his people. After resurrection Jesus takes the role of God and fulfils it among his disciples.
On that day you will not question me about anything. Amen, amen, I say to you, whatever you ask the Father in my name he will give you. Until now you have not asked anything in my name; ask and you will receive, so that your joy may be complete. "I have told you this in figures of speech. The hour is coming when I will no longer speak to you in figures but I will tell you clearly about the Father. On that day you will ask in my name, and I do not tell you that I will ask the Father for you. For the Father himself loves you, because you have loved me and have come to believe that I came from God. I came from the Father and have come into the world. Now I am leaving the world and going back to the Father." (Jn 16:23-28)
Jesus came from the father. Jesus is sure of his origin and he is continuously aware of it and he constantly affirms it. It is in this that Jesus shows his fidelity to the father. Because of this he is able to assure his listeners that whatever anyone asks the father in his name will be granted to him.
Jesus came into the world. Jesus did not go into any empty place. He came into the world where people are. He came into the world that was created by God. The world itself had some link with the father and Jesus came into the world because God had sent him into this world with a mission.
Jesus was going back to the father. Jesus was sure of his destiny as he was sure of his origin. His whole life was centred around the father. That is he came from the father and he had a mission from the father and he was going back to the father. Father was everything for Jesus.