The Best Things

If I listed all the best things,
you would be at the top.
If I recounted the joy life brings,
you are the start and the stop.
When the song in my heart would burst,
you are the probable cause.
When I am asked who comes first,
you are the answer, without pause.
When asked what has power over me,
you are the only answer I see;
your gracious love has set me free -
you demand I be the best I can be.
    And now what do I do for you?
    Just ask and I'll make it true.