O ye wha are sae guid yoursel, Sae pious and sae holy, Ye've nought to do but mark and tell Your Neebours'fauts an folly!

-Burns, Robert
  'Address to the Unco Guid, or the Rigidly Righteous', stanza1.

In pious times, ere priestcraft did begin, Before polygamy was made a sin.

-Dryden,John
Absalom and  Achitophel, pt.1, l.1^2.

Just as the pious man prays without speaking a word and the Almighty hearkens unto him, so the artist with true feelings paints and the sensitive man understands and recognizes it.

-Friedrich, Caspar David
Quoted in S Hinz Caspar David Friedrich in Briefen und Bekenntnissen (1968).