“Blessed be all metrical rules that forbid automatic responses, force us to have second thoughts, free from the fetters of Self.” – W.H. Auden

Not sure of the provenance of this quote, but it was the epigraph of the book, On Grief and Reason, by Joseph Brodsky.

This can be found in the section, Shorts II, in the COLLECTED POEMS:
W.H. Auden