Faithfulness is a lost art in our culture of instant gratification. The same desires that make us impatient to get what we want when we want it cause us to give up on people when we find ourselves facing friction, conflict, and an inevitable struggle.
But what would happen if we, like Mary, determined to be faithful, to be devoted, through thick and thin, through good and bad? Much like the vows we make when we enter into a marriage covenant, God calls us to a deep and committed to relationship with Him. And while His faithfulness is never-ending, ours is fickle. That is why we must make great effort to be devoted to Christ not just when life is good and following Him is easy, but when life is overwhelming and giving up is easy.
"Blessed is the man who remains steadfast under trial, for when he has stood the test he will receive the crown of life, which God has promised to those who love Him." -James 1:12
In a word: passionate.