John warned his readers of worldly dangers that face the Christian as he or she seeks to get to know God better. He did so to enable them to prepare for and overcome these obstacles with God"s help. [source][source][source]
"As often in1John, a section of parenesis [1] follows a series of dogmatic statements." [2][source]
The New Testament uses the term "world" (Gr. kosmos) in at least three ways. Sometimes "the world" refers to planet earth, the physical world (e.g, Acts 17:24). Sometimes it refers to humankind, the human world (e.g, John 3:16), and sometimes it refers to human culture as influenced by Satan, the world system (here). [source][source][source]
John again presented three pairs, as he did in 1 John 2:12-14. [source][source][source]1 John 2:15The love of the worldThe love of the Father 1 John 2:16comes from the worldcomes from the Father 1 John 2:17The world passes awayThe one who obeys God remains forever[source]