Because of the challenges it helps us find ways and understand or selves
By overcoming these challenges your innermost sense of self is keep on growing and having deeper understanding on different things and that's why sometimes people become mature in their own ways.
you'll be able to know your weaknesses and strenghts
It is pertinent that self discovery is a greater key to unlocking most successful part of our lives. "the more you know you, the better you become"--- this presumably sum the totality of discovering one's strength, weaknesses, self-challenges and the likes. Apparently, this gives you an edge over what the outside world think of you.
In same vain, familiarity with your personal challenges provide you a wider range of thoughts---as a rational being, you tend to see the big picture easily than when you are ignorant of your self challenges.
Subsequently, your innermost self gains more confident in dealings! You'll have a better knowledge to relate in the public, making decisions, and probably leading a mass of people to a more promising success. Similarly, you know what you can do and can't do; will help you living hypocritically.