The "horns" Israel boasted of were a symbol of strength and victory. Commentators note this was likely a reference to a blessing God had given their ancestors (Deuteronomy 33:17). Their sin was taking this symbol of God's power and claiming they had achieved it "by our own strength." They credited their military success and security to themselves, forgetting the Giver of all good gifts. This serves as a timeless warning against spiritual pride and self-reliance.