Readings
Isaiah 26.1–6 – On that day this song will be sung in the land of Judah: We have a strong city; he sets up victory like walls and bulwarks. Open the gates, so that the righteous nation that keeps faith may enter in. Those of steadfast mind you keep in peace— in peace because they trust in you. Trust in the Lord for ever, for in the Lord God you have an everlasting rock. For he has brought low the inhabitants of the height; the lofty city he lays low. He lays it low to the ground, casts it to the dust. The foot tramples it, the feet of the poor, the steps of the needy.
Matthew 7.21, 24–27 – ‘Not everyone who says to me, “Lord, Lord”, will enter the kingdom of heaven, but only one who does the will of my Father in heaven. ‘Everyone then who hears these words of mine and acts on them will be like a wise man who built his house on rock. The rain fell, the floods came, and the winds blew and beat on that house, but it did not fall, because it had been founded on rock. And everyone who hears these words of mine and does not act on them will be like a foolish man who built his house on sand. The rain fell, and the floods came, and the winds blew and beat against that house, and it fell—and great was its fall!’
Reflection
Our readings today place before us two powerful images of security and foundations—images that speak both to our faith and to the way we build our lives.
Isaiah offers a vision of a strong city, a place with salvation as its walls and ramparts. It is a city not secured by armies or human achievement, but by the very promise and presence of God. “You keep him in perfect peace,” Isaiah says, “whose mind is stayed on you, because he trusts in you.” And then comes the invitation: “Trust in the Lord for ever, for the Lord God is an everlasting rock.”
In the Gospel, Jesus takes up that same theme of foundations. He speaks of two builders—one wise, one foolish. Both hear the word of the Lord; both experience the wind and the rain. But the difference lies in what they have built upon. The wise builder hears the words of Christ and acts on them, anchoring life upon the rock. The foolish builder hears yet does nothing, leaving their house vulnerable when the storm inevitably arrives.
Both passages, then, remind us that faith is more than knowledge or familiarity with holy things. It is the shaping of our lives around God’s steadfastness. The prophet calls the people to trust; Jesus calls his followers to obedience; both speak of a life founded upon God’s enduring truth.
For many of us, the idea of storms—literal or symbolic—feels very real. We encounter uncertainty, change, loss, and pressures that shake us. And Jesus is clear: he does not promise a storm-free life. The rains fall on both houses; the winds beat against both walls. Christian faith has never been a guarantee of exemption from hardship. It is, instead, an invitation to root ourselves in the one who does not change.
Isaiah speaks of “the humble and lowly” being lifted up, while the proud and self-sufficient are brought low. The strong city of God is not built by those who rely on their own strength or cleverness, but by those who recognise their need for God and open themselves to his grace. In Matthew, likewise, the wise builder is not someone with superior skill, but one who listens and responds—who allows the teaching of Jesus to shape choices, relationships, and priorities.
So these readings challenge us gently but firmly:
Where are we placing our trust?
What foundations are we building on?
And are we content merely to hear the words of Jesus, or are we seeking to live them out?
To build on the rock is, in many ways, an act of patience. Foundations are not glamorous. They are often unseen—daily prayer, forgiveness offered and received, generosity practised quietly, integrity lived out when no one is watching. Small choices, steady obedience, faithful trust. Yet in God’s kingdom these become the stones of a strong and enduring city.
As we gather in worship today, we are reminded that the Church itself is called to be such a place of refuge—a community built on Christ, embodying his peace, and holding one another steady through the storms that come. And we are reminded too that our hope is not in our own strength, but in the everlasting rock who sustains us.
May we, then, hear the call of Isaiah to trust in the Lord for ever, and the call of Jesus to build our lives upon his word. And may God grant us the grace to become people of strong foundations, whose lives bear witness to the peace and stability that he alone can give.
Amen.