The Baron's newfound perspective on living life is encapsulated by his desire to reengage with the world, shoulder responsibilities, and marry Bess, indicating a shift from escapism to active participation in his life's direction.
From the provided passages, the detail that best reveals the Baron's newfound perspective on living life is the realization and conviction articulated in the sentence, "The world seems very far away," he muttered, "but it's there-and I'm not yet done with it. Perhaps I never shall be...Only-how glorious it would be to live here always and never think again!" This thought demonstrates a moment of reflection and the desire to engage with life despite the allure of escapism. It is the emerging thoughts of responsibility and the love for Bess that pivot him towards a future where he can integrate his dreams with the tangible actions required to cultivate a life with purpose and connection.
The progression from isolation and detachment to active engagement and responsibility, culminating in his decision to marry Bess, signifies a profound change in his worldview.