The image of “the chief cornerstone” cited in Matthew 21.42 is a direct reference to Psalms 118.22-23, and it is taken up several times in the New Testament to designate the Messiah Jesus as the foundation of salvation, rejected by men but chosen by God.
In the parable of the wicked vinedressers
In Matthew 21.42, Jesus says:
“The stone that the builders rejected has become the chief cornerstone; this came from the Lord, and it is marvelous in our eyes.”
He is quoting Psalms 118.22-23 here, a messianic text that the Jews knew well. In the context of the , this rejected stone represents the Son killed by the vinedressers, that is, the Messiah Jesus himself, rejected by the religious leaders but established by God as the foundation of the Kingdom.
Quoted again in the New Testament
_Mark 12.10-11 and Luke 20.17 These two synoptic gospels take up the same quotation in the context of the of the vinedressers, stressing that the Messiah Jesus is this rejected stone.
_Acts 4.11 Peter, before the , declares concerning the Messiah Jesus: “Jesus is the stone rejected by you builders, which has become the chief cornerstone.” He explicitly applies this passage to the religious leaders who rejected Jesus.
_Romans 9.33 Paul speaks of a stumbling stone laid in Zion, combining Isaiah 8.14 and Isaiah 28.16, to show that the Messiah Jesus is both foundation and offense for those who refuse to believe.
_Ephesians 2.20 Paul teaches that the Church is built on the foundation of the apostles and prophets, Jesus Christ himself being the cornerstone.
_1 Peter 2.4-8 Peter develops this image: Jesus is the living stone, rejected by men but chosen by God. He is the cornerstone for those who believe, but a stumbling stone for those who disobey.
In Jesus’ day, the cornerstone (or stone of the corner) was of capital importance in architecture, especially in stone constructions such as houses, temples or surrounding walls. It was not merely decorative: it was structural, symbolic and strategic.
Architectural role of the cornerstone
_Foundation and stability The cornerstone was often the first stone laid during construction. It served as the reference point for the alignment of all the other stones. If it was badly laid, the whole building risked being unstable.
_Joining the walls In constructions with corners (such as the corners of buildings), the cornerstone joined two walls and ensured their cohesion. It bore part of the weight and guaranteed the strength of the whole.
_Chosen with care It had to be perfectly cut, solid and durable. A stone rejected by the builders could be judged unsuitable, but sometimes the one that had been overlooked proved to be the most fitting, hence the symbolic force of Matthew 21.42.
Spiritual symbolism
In the biblical context, the cornerstone becomes a powerful metaphor:
_The Messiah Jesus is this stone: rejected by the religious leaders, but chosen by God as the foundation of salvation.
_It represents the foundation of the Kingdom of God, on which the Church is built (Ephesians 2.20).
_It is also a stumbling stone for those who refuse to believe (1 Peter 2.7-8).
Synthesis
In the time of the Messiah Jesus, the cornerstone was indispensable to any lasting construction. By comparing himself to this stone, the Messiah Jesus affirms that he is the solid foundation, the starting point, and the vital link of the Kingdom of God. To reject this stone is to build without a foundation; to welcome it is to build on the rock.