Luke 2:19

Mary kept all these things - All that happened, and all that was said respecting her child. She “remembered” what the angel had said to “her;” what had happened to Elizabeth 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 which occur respecting her children. Everything they do or suffer - everything that is said of them, is treasured up in her mind; and often she thinks of those things, and anxiously seeks what they may indicate respecting 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 just importance, and anxiously seeking what it might indicate respecting her child.

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