Jesus's mission

We know this sounds heartless, but it's true: it simply was not Jesus's driving ambition to heal the sick and meet the needs of the poor, as much as he cared for them. He was sent into the world to save people from condemnation (John 3;17), that he might be lifted up so believers could have eternal life (3:14-15). He was sent by the Father so that whoever feeds on him might live forever (6:57-58). In his important work on the missions of Jesus and the disciples, Andreas Kostenberger concludes that John's Gospel portrays Jesus's mission as the Son sent from the Father, as the one who came into the world and returned to the Father, and as the shepherd-teacher who called others to follow him in order to help gather a final harvest. If Kostenberger is right, this is a long way from saying that Jesus's fundamental mission was to meet temporal needs. 

(DeYoung, Kevin, and Greg Gilbert. What Is the Mission of the Church?: Making Sense of Social Justice, Shalom, and the Great Commission. Wheaton, IL: Crossway, 2011. Print.55)

Early church mission

From What Is the Mission of the Church? by Greg Gilbert and Kevin DeYoung:

The book of Acts is especially important because in it we can actually see the scope and nature of the earliest Christian mission. If you are looking for a picture of the early church giving itself to creation care, plans for societal renewal, and strategies to serve the community in Jesus' name, you won't find them in Acts. But if you're looking for preaching, teaching, and the centrality of the Word, this is your book. The story of Acts is the story of the earliest Christians' efforts to carry out the commission given them in Acts 1:8 (49).

Acts 1:8
    But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”