What Is the Value of Architecture?

Michael Kimmelman, in today’s New York Times:

To pass through Grand Central Terminal, one of New York’s exalted public spaces, is an ennobling experience, a gift. To commute via the bowels of Penn Station, just a few blocks away, is a humiliation.

What is the value of architecture? It can be measured, culturally, humanely and historically, in the gulf between these two places.