This seems to refer to behaviors that will result in a person experiencing spiritual death, that is, to be separated from God forever. (See: [[rc://en/tw/dict/bible/other/death]])
##### "the whole world lies in the power of the evil one" #####
The phrase "the evil one" refers to Satan. God has allowed him to rule the world, but ultimately God is in control over everything. God keeps his children safe from the evil one. (See: [[rc://en/tw/dict/bible/kt/satan]])