How did 2Pac become so mentally strong? What books did he read?

Don't tell me he was born like that. I'm guessing it had a lot to do with books he read. He must have read some really great books and internalized many of the things he read for it to change his mindset and school of thought. He just really didn't give a f@ck, and yet he was still a kind person. And I'm not talking about his gangster image. I'm talking about that genuine mind strength which you can't even fake, Tupac had that.im asking because i saw an interview of him when he was only 17 years old wearing a tank top and he was like any other nice person ever. He was talking about how women don't go for the nice guys and will more likely to jump on the guys who mistreat them. Fast forward I just watched an interview of him in his early 20's he was so wise, wise beyond his years it's just unbelievable. But what strikes me wasn't just his intelligence and wisdom but his strength. He was a stand up guy. I wanna develop my mind strength like that and to be outspoken and also be a stand up guy who speaks out for what is right. But I often care what people think of me and I'm even timid to approach girls or speak up during meetings at work. Anyone has any books suggestion? I mean books that can really take me into the right path to become a stronger and more effective version of myself. Please offer suggestions. And thank you.