Superman: There’s only a handful of people in the world who knew who Bruce was…Knew who Batman was… Just a handful who knew how it started for him. But, I know from how they spoke of him… They didn’t understand. He wasn’t a creature of vengeance. He wasn’t trying to avenge the deaths of his parents by lashing out at every criminal he could find.
Batman: No. He was grateful. He’d been spared.
Batman: He was repaying a debt.
Batman: You two… You had that in common.
From – Superman/Batman #76