The term "world" in the Bible is used in various contexts and can refer to different concepts depending on the passage. It is important to understand these nuances to grasp the biblical perspective on the world and its implications for believers.

1. Creation and the Physical World: The Bible begins with the account of creation, where God creates the heavens and the earth (Genesis 1:1). The physical world is described as "good" in its original state, reflecting God's perfect design and order. Psalm 24:1 states, "The earth is the LORD’s, and the fullness thereof, the world and those who dwell therein." This underscores the belief that the world belongs to God and is under His sovereign control.

2. The Fallen World: After the fall of man, the world became subject to sin and corruption. Romans 5:12 explains, "Therefore, just as sin entered the world through one man, and death through sin, so also death was passed on to all men, because all sinned." The world, in this sense, is seen as a place of moral decay and spiritual darkness, in need of redemption.

3. Worldly Systems and Values: The Bible often contrasts the values of the world with those of the Kingdom of God. In 1 John 2:15-17, believers are warned, "Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him." Here, "world" refers to the systems, values, and practices that are opposed to God's will. The world is characterized by desires of the flesh, the lust of the eyes, and the pride of life.

4. The World as Humanity: In some contexts, "world" refers to humanity as a whole. John 3:16 is a well-known verse that illustrates this: "For God so loved the world that He gave His one and only Son, that everyone who believes in Him shall not perish but have eternal life." This usage emphasizes God's love and redemptive plan for all people.

5. The End of the World: Eschatological passages in the Bible speak of the end of the current world order and the establishment of a new heaven and a new earth. 2 Peter 3:10-13 describes this transformation: "But the day of the Lord will come like a thief. The heavens will disappear with a roar, the elements will be destroyed by fire, and the earth and its works will be laid bare." Believers are encouraged to live holy and godly lives in anticipation of this new creation.

6. The Mission to the World: The Great Commission in Matthew 28:19-20 calls believers to "go and make disciples of all nations." This mission reflects the call to engage with the world, spreading the Gospel and living as witnesses to God's truth and love.

In summary, the concept of the "world" in the Bible encompasses the physical creation, the fallen state of humanity, the systems opposed to God, the collective humanity, and the eschatological future. Each of these aspects provides a framework for understanding the believer's relationship with the world and the call to live in accordance with God's purposes.