Do not be deceived, my beloved brethren.
After falling prey to a phony business scheme, a school teacher lost her life savings. When she went to the Better Business Bureau to report the scheme, they asked her, "Why on earth didn't you come to us first? Didn't you know about the Better Business Bureau?" The teacher replied, "Oh yes. I've always known about you. But I didn't come because I was afraid you'd tell me not to do it."
Deception can be one of the most difficult things to avoid in life because we are often so blinded by desire that we don't see the possibility of having the wool pulled over our eyes. This is why Jesus said in His Word, "Take heed that no one deceive you" (Matthew 24:4). He knew that our desire for His return would be so great that we might be vulnerable to deception by false teachers and bad doctrine. As Christians, we must carefully judge the opportunities we are offered and seek only the will of the Father so that we are not deceived or enticed by the followers of evil.
The human heart has so many crannies where vanity hides, so many holes where falsehood lurks; is so decked out with deceiving hypocrisy that if often dupes itself.