That by a pace goes backward, with a purpose
It hath to climb. The general’s disdain’d
By him one step below; he, by the next;
That next by him beneath: so every step,
Exampled by the first pace that is sick
Of his superior, grows to an envious fever
Of pale and bloodless emulation:
And ’tis this fever that keeps Troy on foot,
Not her own sinews. To end a tale of length,
Troy in our weakness stands, not in her strength.”