constraint quotes

Yet once more,O ye laurels, and once more Ye myrtles brown, with ivy never-sere I come to pluck your berries harsh and crude, And with forc'd fingers rude, Shatter your leaves before the mellowing year. Bitter constraint, and sad occasion dear, Compels me to disturb your season due For Lycidas is dead, dead ere his prime Young Lycidas, and hath not left his peer.

-John Milton
  Lycidas, opening lines.