An interesting topic. Knowing what to do and doing it would also seem the definition of intelligence. Wisdom on the other hand is captured for me by the old prayer: Lord help me to change what must be changed and to accept what cannot be changed and the wisdom to know the difference. As for age in relation to wisdom, what time has taught me is that wisdom is not a permanent resident. She comes and goes; or as we English say, there is no fool like an old fool.