Yooo guys!! Finally.. Thanks for the reaction and great analysis.
"DO YOU" is from his 1st mixtape "RM" released for free on Souncloud in 2015 (Not available on spotify). He responded to his critics, reflected on his insecurities and doubts, and revealed his belief in himself. During an interview about it he said: "If you look at the album cover, my face is divided in black and white. I wanted to show that I was two-faced. I'm positive sometimes and then negative at other times. I speak of hopes at some points and then forget about it later. You can just see it as something I made by pulling out the various rooms inside myself. I wanted to express the thought of, "There are these many sides inside of me, but in the end, this is me, and you who's listening to this is just you too." I enjoyed India Arie's 'Just Do You'. It's a song that gave a lot of comfort to me when I felt confused. I believe that the message of this song gave a lot of influence towards this mixtape. That's why the song that represents the entire message for this mixtape is 'Do You'."
The message of "Do You" is about being yourself with pride and confidence. It advises people to think for themselves wisely and maturely, instead of being "sheep" and giving into the society's close-minded and judgemental way of thinking. It empowers people to do whatever they want to and be themselves; however, "doing what you want, however way you want" shouldn't be taken as "rebelling society by literally doing anything (whether right or wrong) as it makes me look cool and bad-ass" (dude, it makes you look really stupid and immature. So, don't do crap like that for the sake of looking "cool").
There should still be limits and rules--PROPER rules---set by yourselves on yourselves. Like Joonie said in one of the verses, "Freedom" and "self-indulgence" are two very different things that shouldn't be confused with each other.
Be yourself and love yourself, no matter what anyone says.