Vulnerable? What's vulnerable?

“Why do you attach so much negativity to being vulnerable?” she asked.
Well that’s a dumb question, I thought. “Um, because being vulnerable means being weak and open to getting hurt.”
“I see why you believe that, but what if it didn’t have to be true?” She then shared a quote she’d heard from one of her graduate professors: “Perfect vulnerability is perfect protection.”
I fought back an eye roll. Sure, that sounded awfully Zen, but it was clearly an oxymoron.
“I know it sounds contradictory,” continued my coach, always a step ahead of me. “But take a minute to really think about it. What if perfect vulnerability – expressing your real self and being most authentically you, even when it’s scary – is the safest place you can be? Any time you connect with people by hiding parts of yourself or not being authentic, you create relationships that aren’t in alignment with who you really are. Then you have to maintain that false version of yourself to keep up the relationship. And what’s safe about that?”

http://www.thefrisky.com/2012-07-31/girl-talk-redefining-vulnerability/