There is always something to learn from someone. Whenever this is said, there is a tendency from few people to cross question. If it is true, what is there to learn from a criminal or a terrorist who has caused harm to many innocent souls? For people thinking this way, there is an analogy which could explain the idea better.
Everyone might have watched videos on you tube. You will be aware of the ads being played in between videos or at times even while a video is being played. For the first seconds the advertisement will begin to play post which you will find an option to skip it. Based on your personal likes and dislikes you can either choose to watch the ad completely or can skip them. In most cases, we skip these ads and continue watching our interested videos and in some cases we watch the advertisement if we feel the necessity.
Similarly, in life, most of the people we come across will have something positive to be imbibed. At the same time, you need to understand the world is not a perfect place. Not necessarily you must find something good from a person and learn always. Some people are put into this world to make the rest what happens when you donβt follow the right path.
If you see a criminal filled with gory and violent past with no good take away, just ignore like you skip the ads. The learning from the lives of such people is they help you predict the future by showing you what might happen in following this path. Key learning here is to know your mistakes and not applying them in your life.