They should both be changed regularly, and for the same reason. It is better to lose a good argument then win a bad one. If the enemy is in range, so are you. Everyone's crazy, some of us just haven't been diagnosed yet. Permitting others to be happy in their own way, is tolerance at its highest level.
Money is the root of all evil, and man needs roots.
Experience is something you don't get until just after you need it. You cannot achieve the impossible without attempting the absurd. Be careful of reading health books, you might die of a misprint. But He does not throw it into it's nest. The tongue weighs practically nothing.