No one can genuinely love the world, which is too large to love entire. To love all the world at once is pretense or dangerous self-delusion. Loving the world is like loving the idea of love, which is perilous because, feeling virtuous about this grand affection, you are freed from the struggles and the duties that come with loving people as individuals.
When you’re obsessing about one thing, you can reach insights about how to solve hard problems. If you have too many things to think about, you’ll get to the superficial solution, not the brilliant one.