Being vulnerable can be a two-edged sword. It means that we risk emotional or physical harm from a potential assailant but by remaining vulnerable we allow another person to connect more deeply with us.
Vulnerability often comes across as weakness but it actually shows intense courage.
I tend to over-disclose on vulnerabilities so don't go overboard on disclosure as it will backfire unless it's talking to your psychologist or life coach. On the other hand, showing no vulnerability can create silent enemies.