It’s a question we all ask ourselves at some point: “What is my purpose on earth?” This question first hits us hard when we’re young, deciding what to do after school, but it never really goes away. We ask it when we’re successful, when we’re parents watching our children leave the nest, or when we’re retirees trying to figure out what comes next. In every season of life, this fundamental question echoes in our hearts.
Jesus gives a powerful and direct answer in Matthew 5, using two simple but profound metaphors: saltand light.
You Are the Salt of the Earth
In the ancient world, salt was far more valuable than it is today. It was a primary preservative for food and was even used as a form of currency. This is where the saying “he is worth his salt” comes from. Jesus used this familiar image to describe the role of His followers.
- Salt Preserves: Salt’s most crucial function was to prevent decay. In the same way, believers are called to be a preserving influence in the world. Our role is to stand against the moral and spiritual rot that threatens society. By living lives of integrity, kindness, and justice, we become a force for good. Where we work and live, we should see crime decrease, respect for life increase, and values of love and compassion flourish. We are the ones who protect and preserve the world from corruption.
Jesus gives a stark warning: “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 underfoot.” A Christian who loses their influence—who no longer lives out God’s love and truth—becomes ineffective. The people of Israel were meant to be salt for the nations, but they lost their flavor and were scattered in exile. Jesus now announces a new covenant, a new opportunity for us to be the salt He intended.
- Salt Gives Flavor: Just a little bit of salt can bring out the inherent flavor of food, making it more enjoyable and appealing. Similarly, believers are meant to bring a “flavor” to the world. We are called to add richness and joy to a world that can often feel bland and tasteless. Where there is conflict, we should be peacemakers. Where there is sadness, we should be comforters. Where there is hatred, we must show God’s love, returning good for evil. Guided by the Holy Spirit, our actions should bring life, hope, and compassion to those around us.
The Light of the World – A Visible Purpose
Jesus continues His teaching by moving from the metaphor of salt to the analogy of light. In a world without electricity, light was a potent symbol. It represented truth, safety, and guidance in the darkness.
You Are the Light of the World
Jesus reminds us that we are called to be a light for the world, just as the people of Israel were called to be a light for the nations (Isaiah 60:3). He, as the true Light of the World, has now given this task to all believers.
- A Light That Cannot Be Hidden: Jesus says, “A city on a hill cannot be hidden,” and “Neither do people light a lamp and put it under a bowl. Instead, they put it on its stand, and it gives light to everyone in the house.” This is not a suggestion; it’s a command. Our faith, our words, and our actions are meant to be visible. To hide our light would be to betray our purpose.
We are called to be representatives of God, not just to the people of the earth, but to the entire world system (kosmos) that is often in rebellion against Him. Our role is to be a beacon of hope in the darkness, to provide a clear path for others to see God’s truth.
- Our Light Glorifies God: The ultimate purpose of our light is not to draw attention to ourselves. Jesus makes this clear when He says: “Let your light shine before others, that they may see your good deeds and glorify your Father in heaven.”
Our good deeds are not for personal gain or glory. They are a testimony, a physical demonstration of God’s character. When people see our integrity, our love, and our compassion, they should be led to the source of that light: our heavenly Father. Our lives are meant to be a living, breathing revelation of who God is, so that others can be drawn to Him.
- The Cost of Being Light: Being a light for the world isn’t always easy. As Jesus said about John the Baptist, he was a lamp that shone brightly, even though his testimony was not accepted by all and ultimately cost him his life. We, too, must be willing to shine our light even in the face of opposition. Our faithfulness in this mission is what truly matters.
Our purpose on earth is not a mystery. It is to be salt and light. It is to live a life of integrity that preserves the world and a life of love that adds flavor to it. And it is to shine so brightly that others, seeing our good works, will be led to glorify the God who is the true source of all light.
