Bro. Booker preached a message with that title once and I have found it to be true. In the time that I have been in church and watched people on this forum, it astounds me on how far an evil heart will take a once sanctified and set apart saint. If you are following your heart away from what you once knew to be true, it's time to pull the emergency break.
Philippians 2:12 (KJV)
Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.
Are you afraid of being deceived?