“As the bird by wandering, as the swallow by flying, so the curse causeless shall not come.”
I recently watched a funny scene from the movie Despicable Me. Vector, the really bad guy, had stolen a stolen shrink ray and was playing with it in his bathroom (lavatory), and that’s when he purposely shrunk his toilet. He then proceeded to mock the toilet like it was a defeated enemy. When the shrunken toilet popped off the water line, Vector yelled, “Curse you, tiny toilet!”
Curses are as old as mankind, I suppose. They have been around long before Vector, Scooby Doo, Endora (Samantha’s mother), or the literal witch of Endor (1 Samuel 28:7). The first curses recorded in the Bible can be found all the way back in the book of Genesis. There God cursed the serpent (Gen. 3:14), the ground (Gen. 3:17), Cain (Gen. 4:11), and even the anger of Simeon and Levi (Gen. 49:7). So, it would seem that the earliest curses came not from witches, but from God.
However, when God pronounces a curse, it is usually a denunciation of sin (Nu. 5:21, 23; Dt. 29:19–20), His judgment on sin (Nu. 5:22, 24, 27; Is. 24:6), and the person who is suffering the consequences of sin by the judgment of God is called a curse (Nu. 5:21, 27; Je. 29:18). On the other hand, men use curses as tools to bring something about. However, the difference between a curse from God and a curse from man is capacity: man’s is limited, but God is omnipotent.
Those who spew out curses typically have no ability to see them come to fruition. In Eccl. 8:4 we read: “Where the word of the king is, there is power.” In other words, a king can pronounce a curse on his subject’s land or life and have the ability to make it happen. But for most people, “damning” someone is pretty useless.
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I once made a video depicting a monkey puppet making fun of evolution. The video asked the question: “What do you get when cross a monkey with time?” The answer was, “A man? No, just a monkey.” Immediately I received hate mail and curses from atheists around the globe.
On other occasions I have written about my views on marriage, which have brought even more hateful language, and even threats. The curses came by the boat load and generally read like this: “I hope you get sick and die!…go to hell!…damn you!” But therein lies the point of today’s proverb – cursed curses are useless.
Solomon said, “the curse causeless shall not come.” Therefore, we should not fear the curses of fools, for they do not have the capacity bring about the end result. They presume upon a Power beyond their own to bring about the judgment they declare, but “there is therefore now no condemnation to them which are in Christ Jesus” (Romans 8:1).
Let the witch doctor cast spells; let the voodoo doll be stuck with pins; let the curses come from Hell itself; they will fly by me like sparrows on the wind, for they are as powerless as the cursed fools who send them.
 J. A. Motyer, “Curse,” ed. D. R. W. Wood et al., New Bible Dictionary (Leicester, England; Downers Grove, IL: InterVarsity Press, 1996), 248.