And then the lover
Sighing like furnace__________.
The quoted lines occur in the poem “The Seven Ages” by William Shakespeare. With the help of a simile, the poet explains that on attaining adolescence, men fall in love. The passion of love becomes active like heat generated in a furnace. However, this surging passion also declines after crossing a certain point of time. In this line, the poet hints at momentary nature of human affairs.