Here a waterfall is flowing over the rocks, as cool and refreshing as the lava flowing on the opposite side of the cathedral is hot.

God said, '.let birds fly above the earth within the vault of heaven'. And so it was. God created .every kind of winged creature. God saw that it was good. God blessed them, saying 'Be fruitful, .and let the birds multiply upon the earth'....

(Genesis 1/20-22)

Audio Commentary