When a friend does something wrong, don't forget all the things they did right.

We, people, tend to look more closely on a someone’s mistakes rather than their good deeds. We are imperfect, but sure enough, we have done something good in the course of our lives - we have made people happy, we gave our best, we helped someone, and so on. Let us remember that we’re alive to do our best, improve our personalities, and learn from our mistakes. Mistakes are there to help use become better persons, and experiences help us to correct our mistakes.