"When I Consider How My Light is Spent" is one of the best known of the sonnets of John Milton (1608–1674). The last three lines are particularly well known; they conclude with "They also serve who only stand and wait", which is much quoted though rarely in context. Variants of it have been used as mottos in a number of contexts, for example the Dickin Medal for service animals bears the motto "We also serve", and the Navy Wives Clubs of America uses the motto "They Also Serve, Who Stay and Wait". In U.S. popular culture it is perhaps best known for Hall of Fame baseball broadcaster Vin Scully, who would quote it when showing a player not in the game.

John Milton was an English poet, polemicist, and civil servant. His 1667 epic poem Paradise Lost, written in blank verse and including twelve books, was written in a time of immense religious flux and political upheaval. It addressed the fall of man, including the temptation of Adam and Eve by the fallen angel Satan and God's expulsion of them from the Garden of Eden. Paradise Lost elevated Milton's reputation as one of history's greatest poets. He also served as a civil servant for the Commonwealth of England under its Council of State and later under Oliver Cromwell.