Sanctify the Lord

30 Days in 1st Peter - day 21

1 Peter 3:13-22

The Apostles’ writings were deeply connected to the Old Testament. We see that not only in the obvious quotations from the writings of Moses and the Prophets, but also in the hundreds of allusions and subtle references to what had come before them. 1 Peter 3:15 is one of those allusions.

Peter’s phrase “sanctify the Lord God in your hearts” is almost certainly drawn from Book of Isaiah 8:12–13. Seeing that connection makes the passage richer.

In Isaiah’s day the nation was terrified. Political alliances were shifting, enemies were threatening invasion, and everyone was talking about what they feared most. In that moment God said through the prophet:

“Do not say, ‘A conspiracy,’
concerning all that this people call a conspiracy,
nor be afraid of their threats, nor be troubled.
The Lord of hosts, Him you shall sanctify;
let Him be your fear.”

Peter picks up that exact idea when writing in First Peter 3:14–15. His readers were also living in a climate of fear, social pressure, slander, and sometimes persecution. Instead of being controlled by fear of people, they were to set Christ apart as Lord in their hearts.

That phrase sanctify the Lord doesn’t mean making God holier. That is not possible. It means treating Him as holy or giving Him the highest place in your heart. In practical terms it means:

• Let Christ be the One you ultimately fear, not people.

• Let Christ’s authority outweigh public opinion.

• Let Christ define your hope, not your circumstances.

And notice what follows in Peter’s argument. Once Christ occupies that central place in the heart, two things naturally happen – Fear loses its hold on your heart and hope becomes move evident in your life.

That visible hope is what causes people to ask questions. And that is when the Christian is to be ready to give an answer.

So the flow of Peter’s teaching is actually very logical:

Christ honored in the heart → fear defeated → hope displayed → questions asked → gospel explained.

There is a chain reaction of spiritual outcomes that begins when Christ is intentionally honored in our hearts as Lord.

What begins in the heart – sanctifying Christ as Lord – becomes visible in life and the key to gospel conversations

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