Marcus Aurelius said this quote

When you run up against someone else’s shamelessness, ask yourself this: Is a world without shamelessness possible?No. Then don’t ask the impossible. There have to be shameless people in the world. This is one of them. The same for someone vicious or untrustworthy, or with any other defect. Remembering that the whole world class has to exist will make you more tolerant of its members.