Who is M.F.K. Fisher from Necessary Losses and what is their importance?

M.F.K. Fisher is the author of Sister Age. Viorst calls MFK Fisher an "elegant transcender and realist." Fisher asserts the interesting philosophy that in old age we must "use everything that has ever happened in all the long wonderful-ghastly years to free a person's mind from his body." In other words, we need to use our experiences to keep from becoming obsessed with the fact that our bodies are slowing down and aging.