To have a good opinion of others and to give them an excuse :

Keeping an eye on others behavior is a bad merit that blocks your way to their hearts. On the contrary is to have a good opinion of them. So, try hard to give your brothers the excuse as much as you can. Concerning this merit, Ibn Al Mubarak says also “The believer is he who gives his brothers the excuse , and the hypocrite is he who seeks their slips.”