The most effective attitude to adopt is one of supreme acceptance. The world is full of people with different characters and temperaments. We all have a dark side, a tendency to manipulate, and aggressive desires. The most dangerous types are those who repress their desires or deny the existence of them, often acting them out in the most underhanded ways. Some people have dark qualities that are especially pronounced. You cannot change such people at their core, but must merely avoid becoming their victim. You are an observer of the human comedy, and by being as tolerant as possible, you gain a much greater ability to understand people and to influence their behavior when necessary.