In the midst of crazy and unprecedented circumstances, Mary made a commitment to the angel Gabriel, and Joseph made a commitment to Mary. The shepherds made a commitment to investigate the report of the angelic host and the Magi made the commitment to follow the star. Herod made a commitment to eliminate the threat of a potential king.
The greatest commitment of all: the creator made the commitment to enter his creation on the level of a creature, to offer his love and risk rejection.
The greatest question of all: what will be your response to his commitment.
(the thoughts of this post originated 35 years ago in a sermon by now Dr. George Westlake, Jr.)