Don't love the world, neither the things that are in the world. If anyone loves the world, the Father's love isn't in him.
Love of the world ... love of the Father ...  This strongly suggests the "love of God" contrasted with the love of mammon in  Matthew 6:24; and John's statement that the love of the Father is not in one who loves the world corresponds with Jesus' declaration that "No man can serve two masters"  (Matthew 6:24).  Morris pointed out what he called John's little trick of "emphasizing a word by simply repeating it.  He used world three times in this verse and another three times in the next two verses."[38] John used this word "more than twenty times in this epistle,"[39] and in more than one sense.  Hoon thought that the "world" has the "sense of creation as contrasted with the Creator."[40] See under next verse.