True wisdom involves developing excellent judgment about what deserves our emotional investment and energy. The wise person appears undisturbed not from lack of feeling but from careful selection of what to feel strongly about. They don't get upset about traffic, weather, other people's opinions, or minor inconveniences because they recognize these as either temporary, uncontrollable, or ultimately insignificant. This selectivity allows them to respond with full engagement when something genuinely important occurs - a moral choice, a relationship need, or an opportunity to help others. It's emotional intelligence applied to life's infinite stream of stimuli, reserving our finite emotional resources for what truly matters.