Why are you not okay with your mediocrity? A friend of mine asked me this question and I just couldn't answer it and I have been thinking about it ever since.

We were discussing about how I sometimes feel like I don't have the skills or the intelligence to achieve all the things I want to achieve. I keep wishing to different, great, exciting things and then she asked me why being mediocre was bad/not enough and I just couldn't answer it. It made me a bit upset because usually I am hyperaware about myself, why I feel the way I feel, why I hold the moral I hold, so why couldn't I answer this. Do you guys ever feel the need to be anything but mediocre and if so why?