Whoever loves the world does not have the love of the Father. And whoever has the love of the Father does not have the love of the world. For the love of the Father and the love of the world has enmity against each other.
Man can not have both as man can not serve two masters. Either he will love the one and despise the other or he will love the one and hate the other. God will not share him with the devil. He wants all or nothing.
Whoever does have the love of the world still has their hearts set on the glory of this world. Instead of the glory of Heaven.
The trouble and pain which sin has caused is a constant reminder that we live in a fallen and broken world. A broken world filled with the utter darkness, violence and injustice of evil. Where every single one of us personally is effected. But due to worldly splendor despite its corruption, many have a love for the world.
I believe God also permits pain to see how the world really is. To loosen ourselves from it, in order to want change by seeking His face. But some often choose to hardened themselves. Having a care for the world’s approval which is superficial and fleeting. And in their hearts reject God because of what they’re not getting from the world.