Genuine Experience

You cannot persuade a person who has tasted the sweetness of honey that honey is bitter.  No amount of arguments can convince a person of something they know by their own experience is not true.  In the same way, those who have tasted the goodness of the Lord in the Bible cannot be persuaded that God's word is false.  Once you have genuinely experienced the power of God's truth in your life, you will never give it up.  Those who do abandon the faith they once professed have never experienced its reality.