The harder you go at me the harder I flow
Lets do this
I'm just a mirror reflectin your image
The minute you switch up your face I pick up the pace
There's nothin to it

from Jay Z – People Talkin' (Bonus Track) Lyrics on Rap Genius

Meaning

Hova is implying one of the rules of the Art of War by Sun Tzu: to be like his enemy in order to conquer his enemy. So he mirrors his enemies moves quite fluidly and does it quite effortlessly.

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