17 But you, beloved, remember the words which have been spoken before by the apostles of our Lord Jesus Christ.  18 They said to you that "In the last time there will be mockers, walking after their own ungodly lusts."  19 These are they who cause divisions, and are sensual, not having the Spirit.  20 But you, beloved, keep building up yourselves on your most holy faith, praying in the Holy Spirit.  21 Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ to eternal life.