Salt and Light

“Jesus used the concepts of salt and light a number of different times to refer to the role of His followers in the world. One example is found in Matthew 5:13: “You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled by men.” Salt had two purposes in the Middle East of the first century. Because of the lack of refrigeration, salt was used to preserve food, especially meat, which would quickly spoil in the desert environment. Believers in Christ are preservatives to the world, preserving it from the evil inherent in the society of ungodly men whose unredeemed natures are corrupted by sin (Psalm 14:3; Romans 8:8).”

Read more at: https://www.gotquestions.org/salt-and-light.html