There are many situations in which the wisdom of mothers permeates our adult life. Perhaps it’s because that wisdom is simple (“Wear your galoshes”) or scientifically sound (“Brush your teeth.”) But for whatever reason, these epigrams follow us for life, oftimes in the very voice of our mothers, floating about in our memories. The soundest advice of mothers, however, is that which is proven true by time and validated by our own experiences. Advice like “play nice.”