Meaning of Poem

I came across this beautiful poem by GK Chesterton: [***A Little Litany***](https://www.ewtn.com/library/HUMANITY/CHESLITN.HTM) . But it has been very difficult for me to interpret. Especially the following lines: > To see in pictured walls his storied world
Return upon him as a > tale is told. What does this mean 'pictured walls his storied world' This whole stanza, especially 'twilight of twiformed cherubium' > Or young on your strong knees and lifted up
Wisdom cried out, > whose voice is in the street,
And more than twilight of twiformed > cherubim
Made of his throne indeed a mercy-seat. And in this what is the 'mystic rose'? >And kissed upon your mouth the mystic rose. Can someone explain these things? Thank you.