Money comes fast so bein' hungry don't last
Till you look in the mirror and you saw who you was

from J. Cole – Sideline Story Lyrics on Rap Genius

Meaning

Sometimes, in the pursuit of money and success, you lose sight of who you are. Also nice word play with mirror since “saw” = “was” reflected in the mirror. .

Cole’s friend and fellow artist, Wale, has a song about the same topic called “The Number Won.”

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