At what age, do what things

There is nothing wrong for creeks to be shallow and aggressive. There is nothing wrong for creeks to be noisy and sparkling. They are energetic and full of life. In due time, creek water will arrive at a great river, deep, slow and tranquil. There you have plenty of time to reflect on your journey. 

But it is comic for a creek to present its deepness and tranquility to the public. In the end, it is tragic. Many people in their twenties try to help miserable kids in Africa, oblivious to the fact that many Africans in their twenties already have half dozen kids while they have none. Then in their forties and fifties, many desperatelytry to conceive a child of their own to prove that their life is not a total waste. Theyuse all sorts of expensive, invasive and painful medical procedures. What they were doing in their twenties, a time when it was so easy to have children?  

Life is precious precisely because it is irreversible. "At what age, do what things."