for kings and all who are in high places; that we may lead a tranquil and quiet life in all godliness and reverence.
that we may lead a quiet and peaceable life: Paul here gives the reason for the command to pray for those in authority: that we may lead a quiet and peaceable life--that is, that we may live the Christian life and worship God freely without fear of molestation from the civil authorities or governments. Both words "quiet" (Thayer 279) and "peaceable" (Thayer 281) are translated from the Greek as "tranquil" (Vine 242) (1 Peter 3:4, RV) and suggest the idea of peace from without and within, receiving no disturbance from others.