There are people who "will end in disaster" (Phil 3:19), whose "god is their belly and their glory is in their shame" (Phil 3:19). In His word, the Lord calls these people "enemies of the cross of Christ" (Phil 3:18). Who are these people? "I am talking about those who are set upon the things of this world" (Phil 3:19).
Although we are to love the world as Christ loves it (see Jn 3:16) and be the light to the world (Mt 5:14), we are not to be of the world any more than Jesus is of the world, for He has chosen us out of the world (Jn 15:19). Therefore, we must have no love for the things that "the world affords" — "the lust of the flesh, the lust of the eyes, and the pride of life" (1 Jn 2:15-16, KJV). Jesus has given us His Father's word, and the world has hated us for it (Jn 17:14). However, Jesus has sent us "the sword of the Spirit, the word of God" (Eph 6:17), to prove the world wrong (Jn 16:8). By the Spirit and through the cross, "the world has been crucified" to us, and we "to the world" (Gal 6:14). Thus, if we are set on the things of the world, we are enemies of the cross, God's word, and the Holy Spirit.
Be crucified to the world and embrace the cross daily for love of Jesus (Lk 9:23).