The orientation and locus of Paul’s eschatology is important because all discipleship is driven by eschatology. All human beings live toward their desired end. If your eschatology is to run a Fortune 500 company, then you will discipline your life in accordance with that end. If  your eschatology is athletic superiority, then you will discipline your body toward that end. If your eschatology is the transcendence of human consciousness, then you will discipline yourself to attain that end. Some people even discipline their lives toward completely inane ends. 

In terms of Christian history, if your eschatology is the divine subjugation of infidels by means of the church militant, then you will discipline your life toward that crusader end. Conversely, if your eschatology is the escape of the material world and its correlated “tomb of the body” (Gk. sōma sēma), then you will disciple your life toward that monastic end. 

This basic principle of discipleship is why eschatology is so prominent in Paul’s letters. His eschatology, however, is not just any kind of eschatology. ...it is specifically Jewish and apocalyptic" - John P. Harrigan