All these words.
She pondered them
In her heart.”
ἡ δὲ Μαρία πάντα συνετήρει τὰ ῥήματα ταῦτα συνβάλλουσα ἐν τῇ καρδίᾳ αὐτῆς.
Luke said that Mary (ἡ δὲ Μαρία) treasured all these words or matters about Jesus (συνετήρει τὰ ῥήματα ταῦτα). She pondered (συνβάλλουσα) them in her heart (ἐν τῇ καρδίᾳ αὐτῆς). Mary was very self-reflective on what was going on around her. How would Luke know this? Apparently, this infancy story was around before the time of Luke’s writing. There is no question that this infancy story is written from the perspective of Mary.