People are like this: the further you go, the more often you find that the judgments you once believed without a doubt were actually wildly wrong.

For example, I used to think that XX was the best target, but I never considered: how many targets do I really know? And how would it be best picked—from how many targets?
Common-sense at the level of first principles—still obscured by arrogant, foolish subjectivity.
Human growth, in essence, is a process of discovering just how foolish your past self was.