The Father will judge those who are outside. Just expel the evildoer from among yourselves.
This literally means to judge and push out from a community of believers someone who is actively living for the flesh instead of the spirit. I like to take it as a warning to give no quarter to the evildoer within me. Believers should first and foremost examine their lives and work to expel purge themselves of sinful flesh, with Heaven’s help.
Walking In Liberty 