A warning of worldliness

Do Not Love the World
It may sound confusing at first, but the Bible tells us to not love the world (1 John 2:15)...but doesn't John also write elsewhere that "God so loved the world" in John 3:16? The same author?

The Apostle John, inspired by the Holy Spirit uses the same word with different contextual definitions that are easily seen. The Greek word Kosmos in at least 10 different ways in the gospel of John alone: 

• The created universe (John 1:10, 17:5), the physical earth (John 13:1, 21:25), the world system (John. 12:31, 14:30, 16:11), the mass of humanity except believers (John 7:7, 15:8).
• A large group of people, but not everyone (John 12:19), the elect (John 3:17), the non-elect (John 17:9), the realm of mankind (also John 1:10, 3:16), Jews/Gentiles (John 4:42), the public (John 7:3-4).

Just as if you said the word bark: do you mean what dogs do, what trees have, or holiday chocolate?

It is the definition of the world system that 1 John 2:15-17 is employing. And it is in that warning that I hope you are fed by one of the Puritans (a personal favorite) of old, Thomas Watson. Enjoy:
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“O the hazard of honor, the damage of prosperity! Pride, lust, and worldliness, are the three worms which breed in prosperity. (De. 32:15) The pastures of prosperity are dangerous. How soon are we      ensnared upon the soft pillow of ease! Prosperity is often a trumpet which sounds a retreat—it calls men off from the pursuit of religion. The sun of prosperity often dulls and puts out the fire of piety!

“The world is full of golden sands, but they are quick-sands! Prosperity, like smooth Jacob, will supplant and betray! A great estate, without much vigilance -- will be a thief to rob us of heaven! 
Adam in paradise was overcome, when Job on the dung-hill was a conqueror. Samson fell asleep in Delilah's lap. Just so, some have fallen so fast asleep on the lap of ease and plenty, that they have never awaked until they have been in hell! 

“How hard it is for the rich to enter the kingdom of God!" (Lu. 18:24) His golden weights keep him from ascending up the hill of God! And shall we not be content, though we are placed in a lower orb? What if we have not as much of the world, as others do? We are not in so much danger! As we lack the riches of the world, so we lack their temptations. O the abundance of danger—which is in abundance!”
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1 John 2:15-17, "Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world—the desires of the flesh and the desires of the eyes and pride of life—is not from the Father but is from the world. And the world is passing away along with its desires, but whoever does the will of God abides forever."