1. You are inferior, that's a non-changing fact, so get over it. Everybody is inferior relative to somebody else, just as everybody is superior relative to somebody else; it's just how you compare people.

2. You will get better on what you do if you stick to it, but somebody else will be better than you no matter what; that is true for everybody else.

3. You will die someday. Everybody does.

4. You will die soon, as with everybody else.

5. You will surely die - everybody will. So stop obsessing on what you lack and make the most of the time left.