This could only come from an actor. It was mesmerizing and about how to lie and cheat. Go to 14:00 to get the main point.
A similar idea was mentioned in the David Brooks opinion in the NY Times: [nytimes.com]
Normal people have moral sentiments. Normal people are repulsed when the president of their own nation lies, cheats, practices bigotry, allegedly pays off porn star mistresses.
Were Republican House members enthusiastic or morose as they decided to turn off their own moral circuits, when they decided to be monumentally unconcerned by the fact that their leader may be a moral cretin?
Once you take the slippery slope there are few paths back.
You are known by the company you keep.
Lie down with dogs, get up with fleas.
Water (and watery shit) seeks its own level.
Pot, kettle, black.
Etc.