'World' in the Bible

The saying [is] trustworthy and worthy of all acceptance: Christ Jesus came into the world to save sinners, of whom I am the foremost.

And most certainly, great is the mystery of godliness: Who was revealed in the flesh, was vindicated by the Spirit, was seen by angels, was proclaimed among the Gentiles, was believed on in the world, was taken up in glory.

For we have brought nothing into the world, so that neither can we bring anything out.