Short idea (5): Some have, as the whole goal of their lives, to come out of their shells and to enter the world and to venture out and to live and experience and achieve. Others have, as their goal, to retreat from the world, to dampen and tone down their experience, to withdraw from new experiences, to filter out much of the incoming stimuli, to protect themselves. The same person can have the opposite goal at different times, even at different times of the same day.
Longer observation (14): An Objective Measure of Success?: Here is a mathematical formula offered as an expression of the amount of success in a person's life: s = (h-l) + w + gwh - d