“I want a hero: an uncommon want,When every year and month sends forth a new one”These lines are taken from the poem of-

“I want a hero: an uncommon want,
When every year and month sends forth a new one.”
These are the opening lines of Canto 1 of Lord Byron’s famous poem ‘Don Juan’

Don Juan
By Lord Byron
CANTO - I

"I want a hero: an uncommon want,
  When every year and month sends forth a new one,
Till, after cloying the gazettes with cant,
  The age discovers he is not the true one;
Of such as these I should not care to vaunt,
  I 'll therefore take our ancient friend Don Juan —
We all have seen him, in the pantomime,
Sent to the devil somewhat ere his time."

Source: Cliffnotes