There's something about this that makes me slightly uncomfortable. It seems to me that there's a very fine line between perseverance and mediocrity (probably the same fine line between self-belief and self-delusion). I can, for instance, think of a number of startups that 'languished in mediocrity' ... until they got acquired. Blogger and Gravatar, for instance.[1]<p>Has anyone a better measurement for knowing when it is mediocrity and when it is perseverance?<p>[1] Funnily enough, both acquisitions freed up the respective founders to do bigger, better things: Evan Williams to Twitter, and Tom Preston-Werner to Github.