Called to be Witnesses or Philosophers?

I realize that Stanley Hauerwas would not embrace every premise of the Catholic legal theory project, but I find this passage from A Community of Character to be a helpful reminder of the significance that the story of Easter has for us Christians:

The task of the Christian is not to defeat relativism by argument but to witness to a God who requires confrontation.  Too often the epistemological and moral presuppositions behind the Christian command to be a witness to such a God have been overlooked.  The command to witness is not based on the assumption that we are in possession of a universal truth which others must also 'implicitly' possess or have sinfully rejected.  If such a truth existed, we would not be called upon to be witnesses, but philosophers.  Rather the command to be a witness is based on the presupposition that we only come to the truth through the process of being confronted by the truth.