To truly follow Christ requires considering the high cost. Jesus said that to be his disciple one must hate all other people and possessions, even one's own life, and carry their own cross. Salt is only good if it maintains its saltiness; otherwise it is useless. We must put Christ above all else in life, as we were bought with a high price through his sacrifice. True salvation is free but demands everything from the follower, who must be willing to give up comforts and possessions to fully serve God.