The Christian mission can be understood as the conviction that all believers are called to spread the Christian gospel to the whole world, in accordance, for example, with the Great Commission set out by Jesus and recorded in Matthew 28:16-20, so that non-Christians will convert and be saved. More specifically, a Christian Mission is an organized effort to carry on evangelism, in the name of the Christian faith, or a location established for this purpose. Missions involve sending individuals and groups across boundaries, most commonly geographical boundaries. Sometimes individuals are sent and are called missionaries, and historically may have been based in mission stations. When groups are sent, they are often called mission teams and they undertake mission trips. There are a few different kinds of mission trips: short-term, long-term, relational and those that simply help people in need. Some people choose to dedicate their whole lives to mission.