This document discusses the key themes and teachings around 1 & 2 Thessalonians related to Christ's second coming. It notes that 1 Thessalonians encourages believers with messages of faith, integrity, and anticipating Christ's return. 2 Thessalonians warns that false teachers will come and that Christ's return will be preceded by judgement. The document teaches that while the timing is unknown, believers should live confidently and wisely as they await Christ's second coming, after which the old heavens and earth will be destroyed and replaced with new heavens, a new earth, and a new Jerusalem.