What world is John speaking of? -> is he speaking of the earth that the Lord created? -> is he telling us not to enjoy the blessings of the Lord`s creation?
No, he is speaking of the evil that is in the world. -> lust of the flesh -> lust of the eyes -> pride of life.
When we see what is in HeavenlyPlaces our hearts are forever oriented toward Him who fills heaven and earth with His glory. carnality is base and has lost its appeal.