The Clock of Life by Robert H Smith

   The clock of life is wound but once
  And no man has the power
  To tell just where the hands will stop,
  At late or early hour.

  To lose one's wealth is sad indeed,
  To lose one's health is more.
  To lose one's soul is such a loss
  As no man can restore.

  The present only is our own.
  Live, love, toil with a will.
  Place no faith in 'tomorrow'
  For the clock may then be still.