I think that those who serve most potently, work on levels of consciousness that have to do with radiating love — maybe God's love... It is important that you have a brain and use it, but that is secondary. The basic premise is that you allow something to come through you. Then you use your intelligence to give your heart's work discipline and logic. But the transformative energy, that which can change events, that heals, that helps, that serves, comes from somewhere deep inside.
The older we grow, the more we tend to become set in our habits, our outlooks on life, our mental assessments of possibilities. The more flexibly balanced we become, the less chaos we encounter. Harmony is not created by having only one musical tune, but by the blending of many tunes that create a symphony of sound. Individual tunes work together, creating beauty rather than discord. Balance is found in living harmoniously, with flexibility and periods of silence, accepting events as part of the mystery unfolding in our lives.