Understanding people’s nature and being aware of it when dealing with them is vital for a peaceful and positive outcome. Know your mind in order to know their mind. Know your nature in order to know their nature.
You must know you first. For there is no difference between you and them. There is but one mind.
Knowing where someone is in their mind bestows upon you the great blessing on how best to interact or not interact with them. Now you can decide if you want your awareness to flow to where they are in their mind or rather take their awareness and bring it to where you are in your mind.