Many of God's people in Christ's day were ignorant and therefore had to hope
the "Biblical traditions" taught by their Pharisees were not the
broad way that leadeth unto destruction.
Today's Christians wouldn't be that stupid…would they?
These walls attempt to depict God's light
shining through the Deep.
If you don't know what the Deep is
you need some Bible study,
which you can get in chapter D2,
Noah's Flood.
LINK will take you there if you wish.