Stones left to find your way back

My museum and library visits in London this week had a theme, but one I didn't recognize until the trip was over.

• At the British Museum, I found myself drawn to the ways ancient cultures, especially Greek culture, represented their gods in stone.
• At the new British Library (a stunning building), I lingered over a special exhibition called "The Sacred," a collection of early texts of the three great monotheistic religions.
• And at the Library and Museum of Freemasonry, I marveled at the richness of three hundred years of the Craft's imagery.

This theme didn't jump out at me until I read a quotation from architect Louis I. Kahn (see my immediately previous post):

Symbols are gentle reminders. They are stones left to find your way back to where you want to go back to.