'In the World' in the Bible

Therefore, as through one man sin entered into the world and death through sin, and so came upon all men because all sinned,??13 for till the law there was sin in the world, but sin is not accounted where there is no law

(For until the law sin was in the world: but sin is not imputed when there is no law.

For the Lord will carry out His word in the world [i.e., He will require an accounting from the people] quickly and decisively."

your christianity is very well known in the world. I am glad therefore on your behalf: but yet I would have you as expert in that which is good, as unpractis'd in what is evil.