|found on The Meta Picture|
One of the traps some people fall into in vulnerability-centric security is the idea of eliminating all vulnerabilities. The reason it's a trap is that it can never actually be accomplished. There will always be vulnerabilities, no matter what we do.
[If you know where this comic originally came from (looks like it might be Japanese or something) let me know so I can update the attribution. Google image search was unfortunately not very helpful here.]