We learn about the world as we get feedback from things within it such as from family, friends, mentors and even books.
Feedback can tell you where you went wrong and affirm what you do right. It can thus help you predict the future.
Interestingly there are people I have met who question the importance of feedback. They say: “I can figure out everything I need to on my own. I don’t need feedback like others do.” This is not true. In fact there is a big danger lurking in this notion.
If the world you are creating is your own you might get stuck in it or some part of it and not know what to do next.
If however, this world of yours and all parts of it are based on some feedback you will always know who to ask if you get stuck.
Somebody once said that "fundamentally we are here not to be seen, but to see" i.e. to see things outside of ourself. You will notice that all growth you have had has owed itself to some consistent feedback.
Suppose you wrote an essay. You wouldn't really know if it’s good or bad till somebody tells you the flaws in it or the strengths it has. In any case to improve your essay you will definitely need constructive feedback.
A similar example can be about basketball. If you want to improve your game you will need a coach. If he is good he will point out your weaknesses and strengths.
Thus it is very important to get as much ‘constructive feedback’ as you can.
Somehow all feedback is not good. Some people give contradictory messages when they give feedback i.e. one message will tell you an act is good and another message tells you the same act is bad. Avoid such people or at least don’t rely on what they say.
Thus feedback is a way to make sense of the real world.
Invest heavily in it. The more you invest the faster you will grow.