From the beginning, it wasn't 'bout the ends
Eminem didn’t plan to be as big as he is now. It was about making a name for himself at that time and providing for his family.
He is saying that it was never about making money and as he follows up in the next line, it was rapping for the sake of rapping. It was about busting raps and standing for something
He uses the contrast of beginning/end in a dual way that brings out the slang “ends” as in money and the literary “ends” as in terms. Same technique used in the previous bar.
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