Answer:
The final sentence contributes to the end o the article to show we might have fun by doing something one way instead of the other and that we don't know we can enjoy it before doing it.
Explanation:
The sentences are used to point out that sometimes we act based on someone else's thoughts or opinions, and that might be not true. Also, sometimes we can find incredible experiences by trying to achieve our objectives by doing one action instead of others. That there is an infinite amount of probability we can't perceive what could be of value because we have not experienced it.
As I was going up the stair, I saw a man that wasn't there.
He wasn't there again today! Oh, how I wish he'd go away
