No one-liner can ever be optimal.
Breast-feeding is the natural, optimal way to feed a child.
People are clever, but almost no one ever devises an optimal quip precisely at the needed moment. Therefore, virtually all great one-liners are later inventions - words that people wished they had spouted, but failed to manufacture at the truly opportune instant.
I think the recent cluster of WWII novels is so good because we have reached an optimal distance from the war. Just as a lens has its focal length, the novel also has its best distance from the action.
The impact of the Kyoto Protocol on global temperature is quite modest, especially for the first century. The reduction in global mean temperature in the Annex I case relative to the reference in 2100 is 0. 13ºC; this compares with a difference of 0. 17ºC from the Kyoto Protocol calculated by Wigley. The temperature reduction in the optimal run is essentially the same as the Kyoto runs by the 22nd century.
Optimal experience is thus something that we make happen.