Difference between the best of tou and the best in you

Hi everyone

Hope you all are doing good

I'm not american so english isn't my first language and i don't really understand that much about their grammar and the meaning behind some terms and sentences

So i got question that has been going through my mind for a while

What's the difference between " the best of you" and " the best in you" ?

I know it may sound like a stupid question to you but like i said english isn't my first language and I'm really overthinker i don't want to ruin my sleep by thinking about it the whole night.

So i need your help