What does the Bible say about the "world"?

"But if our gospel be hid, it is hid to them that are lost: in whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them." - 2 Corinthians 4:3-4

The devil is the god of this world. He is the prince of the power of the air.

"Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience:" - Ephesians 2:2

When we regret our sins and turn to Jesus, the world is crucified to us and us to the world.

"But God forbid that I should glory, save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world." - Galatians 6:14

We leave behind the things of the world and cleave to the Lord.

"Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God." - James 4:4

"Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever." - 1 John 2:15-17

By the gospel, we leave the world by repentance, we cleave to the Lord by baptism in Jesus name, and we overcome the world through His Spirit within us, the Holy Ghost.

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." - Acts 2:38

"Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world." - 1 John 4:4

"That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;" - Philippians 2:15

With the power of His name Jesus upon us, and the power of His Spirit within us, we are victorious.

"For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith." - 1 John 5:4