Bede, on Rev 21:18

“And the building of the wall thereof was of jasper stone: but the city itself pure gold, like to clear glass.”

“The city itself was pure gold, like clear glass. The Church is figured as gold, often adorned with golden candlesticks and bowls for the sake of wisdom's cultivation. Glass, however, refers to true faith, because what is seen on the outside is also inside, and there is nothing simulated or opaque in the saints of the Church. It can also refer to that time when thoughts are clearly revealed to each other.”

Imported from an open dataset — not yet checked against the printed edition.