To really understand another person you need to understand how your filtering mechanism works.
Your filtering mechanism is your belief system of what you see or another word for that is paradigm. A paradigm is the belief that has been turned into a habit and has been programmed into you. it is how you perceive reality and why you act the way you do and live the way you do.
A paradigm is like railroad tracks. It creates a set direction for how you see the world. Everything you see, everything you’d do everything you perceive of other people and situations, is filtered through your paradigm. It becomes your reality.
So it is also with other people. Their paradigm or belief system filters the information that they take in.
In order to understand how another person perceives reality, you have to understand how they grew up, their culture. You have to understand their personality, and you have to understand their current situation.