What can salt and light have to teach us about God and his reign on earth? Jesus used ordinary images, such as salt and light, to convey extraordinary truths about the kingdom of God. Salt was a valuable commodity in the ancient world. People traded with it, like we trade with gold and stock. Salt also served a very useful purpose in hot climates before the invention of electricity and refrigeration. Salt not only gave food flavor, it also preserved meat from spoiling. Jesus used the image of salt to describe how his disciples are to live in the world. As salt purifies, preserves, and penetrates, so the disciple must be as salt in the world of human society to purify, preserve, and penetrate that society for the kingdom of God and of his righteousness and peace.

Jesus remarks that nothing can remain hidden or secret. We can try to hide things from others, from ourselves, and from God. How tempting to shut our eyes from the consequences of our sinful ways and bad habits, even when we know what those consequences are. And how tempting to hide them form others and even from God. But, nonetheless, everything is known to God who sees all. There is great freedom and joy for those who live in God’s light and who seek this truth.
(Adapted from Don Schwager)