"Once on a time, La Mancha's knight, they say, A certain bard encount'ring on the way, Discours'd in terms as just, with looks as sage, As e'er could… - Alexander Pope

"Once on a time, La Mancha's knight, they say,
A certain bard encount'ring on the way,
Discours'd in terms as just, with looks as sage,
As e'er could Dennis of the Grecian stage;
Concluding all were desp'rate sots and fools,
Who durst depart from Aristotle's rules.
Our author, happy in a judge so nice,
Produc'd his play, and begg'd the knight's advice,
Made him observe the subject and the plot,
The manners, passions, unities, what not?
All which, exact to rule, were brought about,
Were but a combat in the lists left out.
"What! leave the combat out?" exclaims the knight;
"Yes, or we must renounce the Stagirite."
"Not so by Heav'n" (he answers in a rage)
"Knights, squires, and steeds, must enter on the stage."
So vast a throng the stage can ne'er contain.
"Then build a new, or act it in a plain.