
“Old men are always young enough to learn.”
Variant translation: Learning is ever in the freshness of its youth, even for the old.
Source: Oresteia (458 BC), Agamemnon, line 584 ( line 583 of Richmond Lattimore's translation http://books.google.com/books?id=3duN7nP3OQYC&q=%22old+men+are+always+young+enough+to+learn%22&pg=PA40#v=onepage)