A couple more possibles:
"I have a different constitution. I have a different brain; I have a different heart; I got tiger blood, man." Grant explaining why after Cold Harbor he wasn't quitting, and the Army of the Potomac would continue attacking.
"I don't have a tuxedo that fits anymore because my chest and my biceps are too big." Joe Hooker swaggering before Chancellorsville.
"I think my passion is misinterpreted as anger sometimes. And I don't think people are ready for the message that I'm delivering, and delivering with a sense of violent love." James Longstreet after Chickamauga.
"For now, I'm just going to hang out with these two smoking hotties and fly privately around the world. It might be lonely up here, but I sure like the view." Robert E. Lee, perhaps. Or perhaps not.