Annie, my wife, and I have been looking at houses for the last year-and-a-half. We love old houses. With five kids, there is only so much fixing up that is realistic, so there are a few issues that we ask about in every house we consider. One of the issues we always check is the foundation. It is simple really, if the foundation is not good, then the house is not good.
Long ago, a foundation was begun with the setting of the cornerstone. At some point, the advances in modern construction moved the cornerstone from its functional use to a ceremonial use marking the date and architect of the building. Nonetheless, the principle of a cornerstone is plain. The cornerstone was set first and then all the other foundation stones were set in reference to it. By extension, you could say the rest of the building was built in reference to this first stone set. The cornerstone is the standard for the rest of the building.
In 1 Peter 2.6-8, Peter quotes three Old Testament passages applying each of these passages to Christ. All three of these passages deal with cornerstones or a stone as the standard. He writes,
6For it stands in Scripture:
“Behold, I am laying in Zion a stone,
a cornerstone chosen and precious,
and whoever believes in him will not be put to shame.”
7So the honor is for you who believe, but for those who do not believe,
“The stone that the builders rejected
has become the cornerstone,”
8and
“A stone of stumbling,
and a rock of offense.”
They stumble because they disobey the word, as they were destined to do (ESV).
Peter’s message to the elect exiles to whom he writes is that Christ is the cornerstone on which their faith and life are to be built. Peter’s audience in this letter was Christians who had been exiled to a new and foreign land paganism and idolatry were the norm. In such a land, the opportunities to compromise one’s faith for the sake of some fleeting temporal security would have been many. Peter wrote to encourage these believers in the security and hope they had in Christ. He wanted them to know that a hope in Christ was a well placed hope and that a hope in anything else was like erecting a building around a poorly set or shaped cornerstone, it was doomed to fall.
Isaiah’s message to the people of Ephraim and Jerusalem was essentially the same. He writes,
15Because you have said, “We have made a covenant with death,
and with Sheol we have an agreement,
when the overwhelming whip passes through
it will not come to us,
for we have made lies our refuge,
and in falsehood we have taken shelter”;
16therefore thus says the Lord GOD,
“Behold, I am the one who has laid as a foundation in Zion,
a stone, a tested stone,
a precious cornerstone, of a sure foundation:
‘Whoever believes will not be in haste.’
17And I will make justice the line,
and righteousness the plumb line;
and hail will sweep away the refuge of lies,
and waters will overwhelm the shelter.”
The people of Ephraim and Jerusalem, acting in their pride, found their hope and in security in their vain attempts to establish their own name. They had built on a misshapen and poorly set cornerstone, and God was foretelling, through Isaiah, the coming destruction. Peter’s letter to the elect exiles is written that they may avoid a similar fate.
In our day, there are multiple opportunities to compromise everyday. We are constantly faced with the illusion of and temptation of self-security. Occasionally, as with the recent economic downturn, we get an honest look at the instability of our foundation. However, the issue for the people of Ephraim and Jerusalem was not simply that their foundation was weak; the issue was that it was sin. Failure to acknowledge God as the true and living God is sin. Finding our security and hope in something outside of the God’s plan of redemption through Jesus Christ and him alone, is idolatry and sin. The reason the walls built on this misshapen and poorly set cornerstone are doomed to fall is because the cornerstone is fundamentally flawed and our use of it reveals the fundamental problem of our heart, we are sinful idolaters.
We can learn much from the Peter’s letter to these elect exiles in Asia Minor. We would do well to hear and heed Peter’s encouragement to live in this world with Christ as our cornerstone rather than the misshapen and poorly set options the world has to offer, yet we must recognize this is not a passage given merely to self-help. Peter’s use of the cornerstone metaphor from Isaiah and Psalms is a call to repent of our idolatrous and sinful attempts to find security in something other than Christ.

