I know why a brick likes an arch

I think know why a brick likes an arch, Mr. Kahn.

What is a brick?
It is made of clay.
of earth.
of mud, essentially. (just don't tell the brick that)
You were scraped from the earth,
pushed into a mold,
and baked to perfection.
And though it would not do
to put on a whipped topping and a cherry,
it is somehow a work of art still.
A brick is a cornerstone, a symbol.
It holds things up, without fail.
It outlasted the generation that created it.
And now it stands, above the ground,
unaware of his muddy brethren.
You see, bricks are fancy, baked mud.
like us.
And that is why it prefers an arch.