“From perfect grief there need not be
Wisdom or even memory;
One thing then learned remains to me —
The woodspurge has a cup of three.”
The Woodspurge http://www.theotherpages.org/poems/roset03.html#3, st. 4 (1870).
Help us to complete the source, original and additional information
Dante Gabriel Rossetti 33
English poet, illustrator, painter and translator 1828–1882Related quotes

“Epops: A man may learn wisdom even from a foe.”
tr. in Goldstein-Jackson 1983, p. 163 http://books.google.com/books?q=isbn%3A9780389203933+%22A+man+may+learn+wisdom+even+from+a+foe%22+Aristophanes
Birds, line 375-382 (our emphasis on 375 and 378-379 and 382)
Compare the later: "We can learn even from our enemies", Ovid, Metamorphoses, IV, 428.
Birds (414 BC)

On his limited participation in the 2002 FIFA World Cup (Kuper, 2011).
Attributed

TV Series and Specials (Includes DVDs), Trick of the Mind (2004–2006)

De Oculo Morali quoted in Georg Herzfeld (ed.) An Old English Martyrology (1900)
Context: Formerly the Church with its prelates of old time, was golden in wisdom, silver in cleanness of life, brazen in eloquence, which are three things needful to a preacher; that is, brightness of wisdom, cleanness of life, and sonorousness of eloquence. But of the feet, the last, that is the modern prelates, part is iron through their hardness of heart, and part is clay by their carnal luxury.

Go Rin No Sho (1645), The Water Book