cathedrals, catheters and catharsis

What a great word... cathedral.  But say it too many times and my mind moves on to other words like catheter ... and catharsis ... and ... other words I can't think of right now beginning with "cath". (Catherine.)

A reviewer of the PBS documentary, Cathedral (by David Macaulay) has this to say: "Next to the Doric temple the structure that most ineffably captures the concept of "purity" is the Gothic cathedral. With their soaring spires and flying buttresses these Gothic marvels incarnate the eternal human yearning for the infinite and the undefinable."

The eternal human yearning for the infinite and undefinable.

I understand that.

This is something to ponder and investigate.