But Mary treasured up all these things and pondered them in her heart.
Then he went down to Nazareth with them and was obedient to them. But his mother treasured all these things in her heart.
A heart is never completely empty of blood. Only a portion is pumped out of the ventricles with each contraction of the muscle, with some small residual remaining behind in the chamber. The larger the residual, the less effective the pump mechanism is, which becomes known as heart failure, resulting in less oxygen to the body. A normal healthy heart always holds on to a bit of life blood, sending the rest out to circulate and nourish the rest of the body organs.
It seems Mary had a great deal to hold in her heart–it must have been a very strong and powerful organ to handle so much in her lifetime. It was her repository for memories that were precious to her, things she never wanted to forget, events she wanted to tell someone to write down on her behalf someday. It was her storage space for her wonder at what took place before her eyes–the glorification of her son at His birth, the acknowledgement from others that she held God in her arms, that she was able to gaze into His face. He, from a very young age, would teach her more than she could ever teach Him. Her heart literally fed Him during her pregnancy, His heart beating beneath hers. During His childhood and later, her heart poured out love for Him and eventually His heart bled out for us all.
She shows us how we must store up the treasures most precious to us–not worldly things like money and jewels, but the memories of family, the nurture of trust and faith, the healing balm of sacrifice and grace. A heart full of that kind of treasure can never fail.
Where your pleasure is, there is your treasure; Where your treasure is, there is your heart; Where your heart is, there is your happiness.
You must keep all earthly treasures out of your heart, and let Christ be your treasure, and let Him have your heart.