Many have had their greatness made for them by their enemies.
Gracián spots something we usually miss: opposition doesn't merely test our greatness—it *constructs* it. Most assume enemies are obstacles to overcome before we achieve something meaningful, but he suggests the antagonism itself is the forge. Consider how a journalist's reputation for rigor often crystallizes only through her battles with powerful institutions that tried to discredit her; without those adversaries actively working against her, her competence might have remained local, unproven, invisible. The uncomfortable truth is that our finest qualities often need resistance to be recognized as anything more than private virtues.