Actually learning ancient Greek was a brilliant practice of mine because you'd sit there and you'd read a sentence and sometimes it would take you a day, an entire day to figure out one sentence. But it really trains you to be analytical, to think in a certain way to try and interpret what something means. So I've been thinking like that my whole life and then I love Machiavelli and I love thinking about politics that way. So it's sort of all that put together and then the good luck to meet a man who is sort of interested in the same thing.

There's physical adversity, that if you are someone that likes exercise like I do, I exercise everyday. When you exercise, there's pain involved and so you're putting yourself through adversity in that situation. It's never totally pleasurable and there are moments where it's kind of boring or painful and you know that in doing that, you're making your mind and body tougher and more resilient. So must be able to deal with the boredom that happens in life.

If you have no enemies, find a way to make them.

One could draw up all different kinds of adversity depending on what your weakness is.

Mastery is not a function of I.Q. or natural talent or wealthy parents who can send you to the best school, but rather the result of going through a learning process, fueled by the desire to grow and the persistence to push past any obstacles.

If you love music and it requires hours of practice that can be boring, you can survive the boredom, you're not going to love it but you can survive the boredom because you're connected to something that excites you.

Jay-Z is more naturally gifted. He didn't depend as much as 50 did on his personal story. Jay-Z has a great story, he came from a pretty rough background. But 50's early success was so much fueled on the story and where he came from. With Jay-Z, I feel he has a more natural gift for language and for music itself. 50 really had to study and work at it much harder.