"Ten thousand worlds for the three unities!"

Ye doctors sage, who through Parnassus teach,

Or quit the tub, or practise what you preach.

One judges as the weather dictates; right

The poem is at noon, and wrong at night:

Another judges by a surer gage,

An author's principles, or parentage;

Since his great ancestors in Flanders fell,

The poem doubtless must be written well.

Another judges by the writer's look;