Who am I? a question for Lent

Who am I? This man or that other?
Am I then this man today and tomorrow another?
Am I both all at once? An impostor to others,
but to me little more than a whining, despicable weakling?
Does what is in me compare to a vanquished army,
that flees in disorder before a battle already won?

Who am I? They mock me these lonely questions of mine.
Whoever I am, you know me, O God. You know I am yours.

                                    Deitrich Bonhoeffer