How to renew your mind

“Do not be conformed to this world, but be transformed by the renewing of your mind.” Romans 12:2

Renewing our mind is in connection with world conformity. What is world conformity? Why does God the Father hate the world and the Word of God clearly states that if anyone loves the world the love of the Father isn’t in Him?

“Do not love the world or anything in the world. If anyone loves the world, the love of Father is not in them.” 1 John 2:15

“You adulterous people, don’t you know that friendship with the world means enmity against God? Therefore, anyone who chooses to be a friend of the world becomes an enemy of God.” James 4:4

Is the world a system we need to be disconnected from, or just certain things we have to abstain from? Or both.