But most by Numbers judge a Poet's song;
And smooth or rough, with them, is right or wrong:
In the bright Muse tho' thousand charms conspire,
Her voice is all these tuneful fools admire;
Who haunt Parnassus but to please their ear,
Not mend their minds; as some to church repair,
Not for the doctrine but the music there.
These equal syllables alone require,
Tho' oft the ear the open vowels tire;
While expletives their feeble aid do join;
And ten low words oft creep in one dull line:
While they ring round the same unvary'd chimes,
With sure returns of still expected rhymes;
Where'er you find "the cooling western breeze,"
In the next line it "whispers through the trees"
If crystal streams "with pleasing murmurs creep"
The reader's threaten'd (not in vain) with "sleep":
Then, at the last and only couplet fraught
With some unmeaning thing they call a thought,
A needless Alexandrine ends the song
That, like a wounded snake, drags its slow length along.