The real brilliance here lies in Austen's recognition that *effort itself* becomes suspicious—that the very energy we pour into self-justification may betray our uncertainty rather than confirm our conviction. A person genuinely confident in their position typically doesn't need to convince themselves repeatedly; they're already convinced. We see this constantly in arguments where someone keeps circling back to the same defense, elaborating and re-elaborating, when a secure position would simply rest. Austen suggests that our elaborate internal monologues are often less about reinforcing truth and more about papering over doubt we won't quite admit to ourselves, making this a sobering mirror for anyone who's ever spent an evening mentally rehearsing why they were right in a disagreement.