Be resilient.
回復力を高めよう。
It’s quite common for us to get disappointed with outcome of our challenge. It often happens when we try something new. Even when we get better at something, we still feel disappointed about what we did.
Of course it is possible to learn something new or meet a new challenge successfully without getting disappointed. We can improve in something without failure. But if we did so, we might have missed an opportunity to make us stronger.
Whenever you feel disappointed, see it as an opportunity. Because comeback from disappointment gives you strength—the inner strength to overcome every obstacle that stands in your way—and improvement. Be resilient, and enjoy the ride.