Grief, keep within and scorn to show but tears,
Since joy can weep as well as thou,
  Disdain to sigh, for so can slender cares,
Which but from idle causes grow.
Do not look forth, unless thou didst know how
  To look with thine own face, and as thou art.
  And only let my heart,
    That knows more reason why,
    Pine, fret, consume, swell, burst and die.