Boundaries define who we are and establish the limits of what we are willing to accept and what we are not. Setting clear boundaries protects us from manipulation and psychological abuse while also demonstrating that we value and respect both ourselves and others. Setting boundaries is not selfish; rather, it is an act of self-care.
On the other hand, putting up walls signals, 'Do not approach me, you are not welcome, and I do not trust you.' Walls separate us and are most often caused by the fear of hurt and rejection. They are usually based on past traumatic experiences and can have a negative impact on an individual's mental health.
Good description