“Mortal man” by Kendrick Lamar off of the album To Pimp a Butterfly is a story between Kendrick and Tupac about racism and how Tupac was a voice for the black community similar to how Kendrick believes he is a symbol and a new generation voice for black people while also references Nelson Mandela being a voice for anti-racism similar to how Kendrick views himself. In the first few lines it says, 

“The ghost of Mandela, hope my flows they propel it

Let these words be your earth and moon

You consume every message

As I lead this army make room for mistakes and depression

And with that being said my n****, let me ask this question:”

which Kendrick uses “The ghost of Mandela, hope my flow they propel it.” as a metaphor for Kendricks “flows” being his raps and his songs being similar to his own voice for anti-racism like Mandela. Mandela’s views of racism play into Kendricks raps and songs showing that Kendrick is an anti-racism activist like Mandela but with his rap music instead. In the following lines, 

“You consume every message

As I lead this army make room for mistakes and depression”

Showing that Kendricks followers and fans consume his music to the fullest extent and with having that many fans and followers it causes him to make mistakes.