18 who have departed from the truth. They say that the resurrection has already taken place, and they destroy the faith of some.

Read 2 Timothy 2:18 Using Other Translations

Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
who have swerved from the truth, saying that the resurrection has already happened. They are upsetting the faith of some.
They have left the path of truth, claiming that the resurrection of the dead has already occurred; in this way, they have turned some people away from the faith.