The National Gallery succinctly describes the painting:
“Christ is seen indicating a passage in the book held
by the Virgin which one pair of angels contemplates. The others study a
scroll, perhaps given to them by John the Baptist. The book and scroll
may carry phrophecies of Christ's future sacrifice. The draperies and
the rock plinth are very similar to Michelangelo's earliest
sculptures” (National Gallery, London. March 5, 2002.