Extremes. The willful blindness of the wisdom of moderation can harm us, or even kill us. Too fat, too lazy, too busy, too productive, too extreme, too... anything, can be bad for us, and we won't realize it until it's too late.
Most of us know Oliver Sacks for his best-selling books, which have sold well over a million copies. A practicing neurologist for most of his life, the New York Times called him “one of the great…