Truth is this is a very complicated subject. If you keep on comparing yourself to other people who are more skilled than you, you will always feel like crap. Because you are making the mistake of not examining the whole person, but observing their best qualities and then comparing them with yours. So if you see a good tennis player you say, why is he better than me. You see a good mathematician and you think again, why am I not that good. But that mathematician might be bad at tennis, or the tennis player might be bad at math, yet you want to surpass them both in both aspects. Now try to extend this logic even more and see how crazy it becomes when you start doing comparisons like that. The point is for the comparison (if done at all) to be in subject that really matters to you (not everything) and also be something that you wish to push yourself to improve. These people can therefore act either as a role model for you or as a further incentive to push yourself to be like them. Therefore they will have a positive impact and not a negative impact on you. That is all I can think of mate. Good luck.