Siegfried Sassoon

I believe that the purpose for which I and my fellow soldiers entered upon this war should have been so clearly stated as to have made it impossible to change them, and that, had this been done, the objects which actuated us would now be attainable by negotiation.

The poet is primarily a spokesman, making statements or incantations on behalf of himself or others - usually for both, for it is difficult to speak for oneself without speaking for others or to speak for others without speaking for oneself.