Parched Knowledge

If in need of water why do I present a glass filled with vinegar?

I have seen the water’s source
  and know who serves it
    genuinely thirsting for its refreshment

I have the knowledge though am unprepared to receive.

The vessel I present is already full
  and I fight to let go of that which fills it
    unable to empty it of that which I know

I walk away parched, clinging to a glass filled with vinegar.