We have a love perception problem, and it's impacting every part of our lives.  John is refocusing this young church (and us as well) back to the love of the Father through through Jesus the son.

 1 John 3:1 See what kind of love the Father has given to us, that we should be called children of God; and so we are. The reason why the world does not know us is that it did not know him.