Growth is painful yet necessary else you remain stagnant. There is no evolution without progress or growth. Disappointment is a sign of intelligence, it means you learn to accept things as they are rather than trying to see them how you want them to be.
When you get acquainted with disappointment then it means you accept that you don’t control things in life.
Growth brings a sense of inner acknowledgment that you can handle anything in life if you just let it happen the way it wishes to unfold.