"許しとは過去が違っていたかもしれないという希望を捨てることです。"

Simplified Meaning:

When you forgive someone, you stop wishing that things could have happened differently in the past. It means you accept what happened, even if it hurt you, and decide to move on instead of being stuck feeling regret or anger. Imagine a friend got angry and said something mean to you. Holding on to that hurt only makes you continue feeling bad. But if you forgive them, you let go of that pain and start to heal. For example, if you were treated unfairly at your job, and you keep thinking about how things could have been better, you will always feel upset. But if you accept the past as it is and decide to forgive, you free yourself from those negative feelings. This doesn't mean you have to forget or excuse what happened, but it means not letting it control your emotions anymore. In your personal life, this can make you feel lighter and more at peace, because you're not carrying around the heavy burden of wishing the past was different.