233 <br /> <br />The Lamp burns sure—within— <br />Tho' Serfs—supply the Oil— <br />It matters not the busy Wick— <br />At her phosphoric toil! <br /> <br />The Slave—forgets—to fill— <br />The Lamp—burns golden—on— <br />Unconscious that the oil is out— <br />As that the Slave—is gone.<br /><br />Emily Dickinson<br /><br />http://www.poemhunter.com/poem/the-lamp-burns-sure-within/