My pain is their pleasure I'm the saint and the sinner

from Jeezy – It's A Cold World Lyrics on Rap Genius

Meaning

“Their pleasure” more than likely refers to people in the world, more specifically the Land of the Free, that tend to laugh and make light of the plight of the modern black man.

With the second half of the bar, Jeezy seems to be trying to say to those who mock him for his troubles that he’s capable of great good and great evil

Kind of like the main theme of this lil' album here:

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