Classic Poem

Who is mad without a peer?
Madder still from year to year?
Peter 'tis, I fear:
Sure 'tis Peter, sure 'tis Peter,
Life's a variorum

Who is wise as Swift or Pope?
Arrow-straight his way doth grope?
Peter 'tis, I hope:
Sure 'tis Peter, sure, &c.

Who is like all sons of men?
On addle eggs a hatching hen?
Peter 'tis, I ken:
Sure 'tis Peter, sure 'tis Peter,
Life's a variorum.