For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error.
The description of FAKE believers and preachers use great oratory skills and try to impress people with their words and appeal to the lusts and weaknesses of the flesh. The people who have a clean and pure heart escape from these types because they are pure in heart being washed in the blood of Jesus Christ and indwelt by The Spirit of God.
"Greater is He that is in thee than HE (satan) that is in the world..."