Heresy
How to prevent susceptibility to heresy. It's in the Bible, Colossians 2:6-7, TLB. "And now just as you trusted Christ to save you, trust Him, too, for each day's problems; live in vital union with Him. Let your roots grow down into Him and draw up nourishment from Him. See that you go on growing in the Lord, and become strong and vigorous in the truth you were taught. Let your lives overflow with joy and thanksgiving for all He has done."
