For unflagging interest and enjoyment, a household of children, if things go reasonably well, certainly all other forms of success and achievement lose their importance by comparison.
Superior technical achievements - used correctly both strategically and tactically - can beat any quantity numerically many times stronger yet technically inferior.
Most people aren't unsuccessful in life because they don't know what to do. They are unsuccessful because they don't DO what they know how to do. Knowledge is power IF...you use it.
That has been the great achievement of our age: to so thoroughly flood the planet with megabits that every image and fact has become a digitized disembodied nothingness. With magnificent determination, our species has advanced from Stone Age to Industrial Revolution to Digital Emptiness. We've become weightless, in the bad sense of the word.