Just as a garden needs worms, we need bad feelings.... We tend to think about bad feelings--feelings like anger, envy, spite, and contempt--as the weeds in life's garden. You may not be able to get rid of them completely, but you're supposed to battle them as best you can. The best garden is one with no weeds. The best life is one with no bad feelings. But this isn't quite right, according to philosopher Krista K. Thomason...