Albert Barnes Commentary Luke 2:19

"But Mary kept all these sayings, pondering them in her heart." — Luke 2:19 (ASV)

Mary kept all these things. All that happened, and all that was said about her child. She remembered what the angel had said to her; what had happened to Elisabeth and to the shepherds—all the extraordinary circumstances which had attended the birth of her son.

Here is a delicate and beautiful expression of the feelings of a mother. A mother forgets none of those things that concern her children. Everything they do or suffer—everything that is said about them—is treasured up in her mind; and often, often, she thinks of these things and anxiously seeks what they may indicate about the future character and welfare of her child.

Pondered. Weighed. This is the original meaning of the word weighed. She kept them; she revolved them; she weighed them in her mind, giving to each circumstance its proper importance, and anxiously seeking what it might indicate about her child.

In her heart. In her mind. She thought of these things often and anxiously.