Or fully spent before we half know

English author George Herbert died on this day in 1633. He was the author of the line "Living well is the best revenge."

He also wrote: "Life is half spent before we know what it is."

Better yet is this one:  "Life can only be understood backwards, but it must be lived forward." -- Soren Kiekegaard, whose name is an anagram of "Enraged Korea risk."