Just as surely as you have a physical immune system, the good news is, you have a psychic immune system.
You are carrying about a virtual edifice of stored functions, adaptive strategies, and defensive maneuvers that are continuously in play in, for want of a better word, your mind or your psyche.
Let’s consider for a moment the popular conception of ‘defensiveness.’ It has a negative connotation. Are we to be without defenses? I think not. We need our defenses. We carry about a phenomenal mind system. Like any system, it needs mechanisms to ensure it’s well being and functionality. So, the next time someone says to you, ‘you’re being defensive,’ I suggest you reply, ‘yes, and the problem is what?’