You are the salt of the earth. But if salt loses its taste, with what can it be seasoned? It is no longer good for anything but to be thrown out and trampled underfoot. 14 You are the light of the world. A city set on a mountain cannot be hidden. 15 Nor do they light a lamp and then put it under a bushel basket; it is set on a lampstand, where it gives light to all in the house. 16 Just so, your light must shine before others, that they may see your good deeds and glorify your heavenly Father.
After teaching the Beatitudes, Jesus speaks directly to His disciples. Those who follow Him are called to live in a way that blesses the world. Their lives are to influence others for good, not by force or display, but by faithful deeds that make God’s goodness visible.
Jesus first says, “You are the salt of the earth” (v. 13). In the ancient world, salt was useful and valuable. It gave flavor to food and helped preserve it from decay. In the Old Testament, salt was also connected with covenant faithfulness, as when the offerings of Israel were to be seasoned with salt (Lev. 2:13). By calling His disciples salt, Jesus teaches that their lives are meant to bring the goodness of God into ordinary human life. Their words, choices, mercy, patience, and faithfulness should help preserve what is good and resist the corruption caused by sin.
Jesus then warns that salt which loses its taste becomes useless (v. 13). Some ancient salt could be mixed with impurities and lose its usefulness. The point is clear. A disciple who stops living according to Christ’s teaching no longer serves the purpose for which he has been called. Faith is meant to be lived. The Beatitudes describe the character of the disciple, and this passage shows that such a life must bear fruit in good works.
Jesus then says, “You are the light of the world” (v. 14). In Scripture, light is often connected with God, His word, and His saving work. The psalmist says, “The LORD is my light and my salvation” (Ps. 27:1), and also, “Your word is a lamp for my feet, a light for my path” (Ps. 119:105). The prophet Isaiah speaks of Israel’s calling to be “a light to the nations” (Isa. 49:6). In the Gospel, this calling reaches its fullness in Christ, who is “the light of the world” (John 8:12). Those who belong to Him share in His mission by bearing witness to Him in daily life.
Jesus uses two simple images to explain this. A city set on a mountain cannot be hidden (v. 14). Such a city would be visible from far away, especially when lit at night. A household lamp was also meant to give light. In a simple home, one lamp placed on a stand could give light to everyone in the house. Placing it under a basket would defeat the purpose for which it had been lit (v. 15). In the same way, the life of a disciple is meant to give light to others.
Jesus then explains the purpose of this light: “your light must shine before others, that they may see your good deeds and glorify your heavenly Father” (v. 16). The good deeds of the disciple are meant to lead others to God. They are works of faith, love, mercy, truth, and holiness. The disciple does not seek praise as the final goal. The Father is glorified when others see the goodness that comes from a life formed by Christ.
This teaching gives a simple pattern for Christian life. Faith is meant to become visible through goodness. A kind word, an honest choice, a merciful action, patience in difficulty, care for the poor, forgiveness, and fidelity to Christ can all become light for others. In this way, the disciple quietly helps others recognize the presence and goodness of God.
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Sources and References
- The New American Bible, Revised Edition. Matthew 5:13-16 and notes on Matthew 5:13-16.
- Hahn, Scott, and Curtis Mitch. The Ignatius Catholic Study Bible: New Testament. San Francisco: Ignatius Press, 2010. Page 15.
- José María Casciaro, gen. ed. The Navarre Bible: New Testament, Expanded Edition. Dublin: Four Courts Press; New York: Scepter Publishers, 2008. Pages 61-62.
- Brown, Raymond E., Joseph A. Fitzmyer, and Roland E. Murphy, eds. The New Jerome Biblical Commentary. Englewood Cliffs, NJ: Prentice Hall, 1990. Page 640, paragraph 25.
- Aguilar Chiu, José Enrique, et al., eds. The Paulist Biblical Commentary. New York: Paulist Press, 2018. Page 920.
- Collins, John J., Gina Hens-Piazza, Barbara Reid OP, and Donald Senior CP, eds. The Jerome Biblical Commentary for the Twenty-First Century. Third Fully Revised Edition, with a Foreword by Pope Francis. London: Bloomsbury T&T Clark, 2022. Page 1182.
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