renewal of strength

The prison-house in which I live
     Is falling to decay,
  But God renews my spirit's strength,
     Within these walls of clay.

  For me a dimness slowly creeps
     Around earth's fairest light,
  But heaven grows clearer to my view,
     And fairer to my sight.

  It may be earth's sweet harmonies
     Are duller to my ear,
  But music from my Father's house
     Begins to float more near.

  Then let the pillars of my home
     Crumble and fall away;
  Lo, God's dear love within my soul
     Renews it day by day.