Mat 21:42 Did you never read in the scriptures, The stone which the builders rejected, the same is become the head of the corner: this is the Lord's doing, and it is marvellous in our eyes?Here is a verse that few people today can understand without study. As a matter of fact, I have seen some "official" English translations that get it exactly wrong, confusing a capstone with a cornerstone, which is to exactly miss Christ's point. In the original Greek, there is also an interesting play on words about capstones and leaders that is completely lost in English.
After we go through the analysis, you will see that Christ is making the specific point that a leader of the community is different from regular citizens, like the capstones are different from the rest of the stones in the wall including the foundation stones. The regular stones have to be square, consistent in size and shape. They have to "fit into" the wall just like regular citizens have to "fit into" society. Capstones cannot fit in in the same sense and retain their value. The must have an odd angle that doesn't fit in. In the same way, a leader must "stand out" from the crowd. Leaders are often initially rejected because they are different. Capstones are also initially rejected because they have this odd angle.
The first meaning of "head of the corner" comes from the technique of coping an exterior wall. The coping is the final, finishing layer of stone that protects the rest below. The coping layer in a brick or stone wall is slanted so that it sheds water, protecting the wall. This is the opposite of a cornerstone, which holds the weight of the foundation, both figuratively and physically. The cornerstone, like other stones in the way must be as square as possible to make the wall stand straight. The capstone however is slanted. If it wasn't in wouldn't work. Both cornerstones and capstones are larger than the average stone, but for different reasons.
Why is this important? Christ is teaching something very important here about what works. Something that works in most situations, such as the square stones in a wall, does not work in key situations, that is, for the top, protecting layer of a wall. Builders reject stones that aren't square, but they save them for the coping layer on top. Christ is not describing something special or stupid in rejecting a slanted stone, but something that is normally done by people who know how to build.
This idea continues in the second meaning of "head of the corner." The alternative meaning of this phrase comes from alternative meaning in Greek for both "head" and "corner."
Another meaning of "head" in Greek is "the crown," in the sense of the top of someone's head, which came to mean the regal adornment of the head. This idea of "crown" originally was that of a "finish touch," like we might say "a crowning achievement." We use "head" somewhat negatively, as in "having a situation come to a head," that is, come to crisis, but in Greek, to put a "head" or "crown" on something was to finish it completely, like we might say, "put a cherry on top." Of course, from this idea came the idea of "crowning" a leader. (Note: Not to be confused with the circlet of metal or leaves that Greeks used as crowns, which were called
stephanos.)
This brings us to "corner." In Greek, another meaning for "corner" is "a leader of a people." We don't use the word "corner" similarly, but the meaning is easier to understand if you think of the corners as supporting a structure, like a pillar does. We doe say a "pillar of the community" to describe a leader. In Greek, they would say "the corner of a community" in the same sense.
The original saying that Christ is quoting came from the Old Testament, specifically
Psa 118:22. The rest of the Psalm is unremarkable, very like many others. This one line sticks out. As the son of a brick layer and house builder (mistranslated into English as a "carpenter"), Christ would have understood the meaning of this stanza. This line is prophetic, describing Christ's life as one that would have an odd angle on things, so much so that he made plays on words like this one.
Also, thinking about this a little more deeply, Christ saw himself as the capstone of Jewish teaching, that is, the finishing touch on the wall. The foundation of that wall was the Patriarchs (see
Isa 28:16). Christ, however, finished it, crowned it, and protected it.
"Scriptures" is from
graphê, which means "drawing," "writing," "the art of writing," "that which is written," "a list," "a prescription," and "official records."
"Stone" is from
lithos, which means "a stone," "stone as a substance," and various specific types of stones, such as touchstones, and altar stones.
"Rejected" is from
apodokimazô, which means specifically "reject on scrutiny," "reject as unfit or unworthy," and "reject for want of qualifications."
"Head" is from
kephalê, which means "head of a man or beast," "an extremity," "the top," "the capital (top) of a pillar," "the coping of a wall," "the source of a rivalry," and, metaphorically the "crowning" or "completion" of a thing.
"Corner" is from
gônia, which means "corner," "angle," "a quarter of a compass," and "a leader of people."
"Marvelous" is from
thaumastos, which means "wonderful," "marvelous," "admirable," "excellent," and "to be worshipped."