SALT AND LIGHT: WORD NOT WORK
Matthew 5:13-20
Fifth Sunday after the Epiphany, Year A
Analysis by Kevin Anderson
13“You are the salt of the earth, but if salt has lost its taste, how can its saltiness be restored? It is no longer good for anything but is thrown out and trampled under foot.
14“You are the light of the world. A city built on a hill cannot be hid. 15People do not light a lamp and put it under the bushel basket; rather, they put it on the lampstand, and it gives light to all in the house. 16In the same way, let your light shine before others, so that they may see your good works and give glory to your Father in heaven.
17“Do not think that I have come to abolish the Law or the Prophets; I have come not to abolish but to fulfill. 18For truly I tell you, until heaven and earth pass away, not one letter, not one stroke of a letter, will pass from the law until all is accomplished. 19Therefore, whoever breaks one of the least of these commandments and teaches others to do the same will be called least in the kingdom of heaven, but whoever does them and teaches them will be called great in the kingdom of heaven. 20For I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.
“Faith finally rests – not in progress, not in visibility, but in the promise heard and believed. That promise is the salt. That verdict is the light.”
DIAGNOSIS: Christian Action Isn’t Enough
Step One: Initial Diagnosis (External Problem) – Discipleship Practices?!
Salt and light. It seems straightforward. Jesus gives what sound like simple commands. Just before this, he has named blessing in ways that run counter to the world’s assumptions. Just after this section, Jesus will give more commands. The reasonable conclusion is easy to draw: this is what it looks like to live as salt and light.
So we turn salt and light into discipleship practices – things Christians are supposed to do in the world. Fair enough. At one point here in the Phoenix area, a congregation even placed “salt + light” stickers on the backs of cars, as a visible reminder of Christian witness.
But this move introduces a problem almost immediately. Are we salty enough? Are we shining brightly enough?
What began as instruction becomes self-evaluation. Salt and light become standards we measure ourselves against, leaving us unsure and anxious about whether we are doing enough, showing enough, being faithful enough.
Step Two: Advanced Diagnosis (Internal Problem) – Faith as Moral Performance
Once salt and light become practices, they also become measuring tools.
What counts as “salt” or “light” is determined by what seems reasonable or moral in our time and place. God’s law is subtly bent to fit our current standards of goodness and visibility.
We begin to justify ourselves over and against others. We reassure ourselves that we are certainly doing better than those people. Faith slides quietly into morality.
This is why Jesus’ words (in vv. 18–19) become so unsettling. Not one letter of the law will pass away. Those who relax even the least commandment are called least in the kingdom. What we thought was manageable suddenly feels absolute.
Here the real confusion surfaces: we have equated faith with moral performance. We have treated faith as something we can monitor, manage, and control – as if it were a project rather than a gift.
The object of our faith has shifted from God’s promise to ourselves – our reason, our morality, our practices.
Step Three: Final Diagnosis (Ultimate Problem) – Salt and Light: Our Death
At the deepest level, God’s promise alone is not trusted. The promise that sinners are made right purely by God’s action in Christ feels insufficient. A God who justifies by sheer Word appears irresponsible – not demanding enough.
Surely there must be a to-do list. Surely God expects visible improvement. So we replace God’s Word with our practices. Reason and morality step in where promise is judged inadequate.
We attempt to justify ourselves using the law – adjusting it, supplementing it, making it workable. But here the law finally does what it always does: it kills.
Salt and light, pressed into the service of the law, expose, preserve, illuminate – and in doing so reveal our true condition before God.
The law salts and lights not our progress, but our death.
In turning salt and light into discipleship practices, we reenact the very rejection that leads to the cross. God is no longer trusted as giver and is recast as manager of our improvement. A God who speaks righteousness into being is not believed – and the consequences are fatal. It is here that the law is accomplished.
PROGNOSIS: God’s way: Salt and Light
Step Four: Initial Prognosis (Ultimate Solution) – Righteousness Spoken
God takes all of this into God’s own life in Christ on the cross. Every attempt at self- justification, every system of reason and morality we construct, is absorbed into Christ’s death. But God does not let this have the final word God allows our frameworks to have their say – and then raises Jesus anyway.
The resurrection is God’s verdict against our verdicts. Righteousness is not achieved, but declared. Spoken and given in Christ. Delivered in baptism. Life, not merely improvement, is the outcome.
Step Five: Advanced Prognosis (Internal Solution) – Spoken Promise, Heard
This good news is heard. And this hearing is the continuation of salt and light. Through preaching (yes, we are made preachers in baptism) – whether from the pulpit or spoken between neighbors – God uses both law and gospel. The law salts and lights our death. The gospel salts and lights our life.
Salt and light are not discipleship practices grounded in reason and morality. They are what we preach. The law fully condemns. The gospel fully justifies.
Faith finally rests – not in progress, not in visibility, but in the promise heard and believed. That promise is the salt. That verdict is the light.
Step Six: Final Prognosis (External Solution) – Preachers of Salt and Light
Having been spoken out of the grave with Christ, we are sent into “ordinary life” – doing whatever our hands find to do.
We no longer measure ourselves by whether we are sufficiently salty or bright. Faith is not tracked. Love is not audited. God is not consulted as a measuring device. Instead, God hides under masks – daily work, ordinary care, quiet love of neighbor.
We live as baptized people – preaching salt and light in all of their fullness.
