I believe, for example, that my father was brighter and more intelligent than I am, but I am more aware and/or conscious of more "things", enough for me to be more worldy-wise, more spiritual, more informed, more potentially wise; in general, better able to interact with my "total" environment. Intelligence and awareness.
Two distinct qualities that will have to be nurtured individually and separately?
In the case of physical growth, very minimal conscious effort is required from us. We will grow and age regardless of the amount of effort expended.
But awareness is something one has to continually feed and nurture if we ever hope to attain maturity. It does not develop automatically.
Thus, we sometimes judge that certain people while looking like adults, act and think like children.