In this quote, Franklin D. Roosevelt expresses his fondness for participating in discussions or fights of concepts. He recommends that nothing else captivates his attention or passion to the same level as a well-contested fight. This could be seen as an indicator of his interest for argument, where he enjoys the intellectual and rhetorical obstacles it provides. Additionally, it highlights his durability and determination in defending his beliefs and principles. Roosevelt's declaration suggests that he values the opportunity to engage in arguments as a way to check his concepts, refine his arguments, and eventually make progress in his pursuit of reality and justice.