If you remove the sorrow that is intentional or not modified into lessons. it will benefit, but if they continue to crash again. What will you lose, though, is?"Lose the opportunity.
If you take any regrets. Intentionally or not will To retrofit a lesson. It will benefit He kept repeating the mistakes repeatedly. What you will lose it. Is "wasted opportunity
If you take the sorrow that on purpose or not to modify a lesson, it will work. But if still around mistakes repeatedly, what will you lose it is "lose the chance.