The document discusses what believers must do to endure until the end based on passages from the Bible. It says that believers must: 1) build themselves up in faith by making progress in their faith and standing firm on God's word, 2) pray in the Holy Spirit by allowing the Spirit to intercede for them, 3) guard themselves in God's love by consciously choosing to love one another, 4) wait patiently for Jesus' return without growing weary, and 5) save others by preaching the gospel to bring more people to faith.