The following verse (Romans 12:2) helps us to understand. We are a living sacrifice for God by not being conformed to this world. The world is defined for us in 1 John 2:15-16 as the lust of the flesh, the lust of the eyes, and the pride of life. All that the world has to offer can be reduced to these three things. The lust of the flesh includes everything that appeals to our appetites and involves excessive desires for food, drink, sex, and anything else that satisfies physical needs. Lust of the eyes mostly involves materialism, coveting whatever we see that we don’t have and envying those who have what we want. The pride of life is defined by any ambition for that which puffs us up and puts us on the throne of our own lives.