In plain words
Kaṃsa flew into a rage, at once seized Devakī Devī by the hand, dragged her out and tried to kill her. Vasudeva stood in the way: “Kaṃsa! The one to kill you is the child born of her eighth pregnancy, is he not? Wait until then. The moment the infant is born, I shall bring it and place it in your hands. Do not kill your sister unjustly,” he pleaded. Kaṃsa respected Vasudeva's word and let her go. But his peace of mind was gone. In fear that his killer might be born at any time, anywhere, he went on killing all the children born in the village. Demons have no steadiness on any one word. When he knew that it was a word spoken by God, why should he believe one part alone and not believe the second? He said that his killer would be born of Devakī's womb; He did not say he would be born to the villagers! Then why kill all the villagers' children? Does that look like faith in the word of God? No, no. That is demonic faith. Through just such demonic faith man grows weak. If you trust God, you must trust fully the words God speaks. Trusting the words you like and not trusting the words you dislike … this is not right faith.
A small example: ten years ago a gentleman came: “Sathya Sai Baba is God. God is in every being,” he went about proclaiming. Later, when things went somewhat against his wishes, he said, “He is not God.” Yes and no came from one and the same mouth! That day he said ‘yes’; this day he said ‘no’. Is that true? Is this true? What are we to make of one who speaks such double words? Just this is called demonic faith.
To those who say ‘yes’, say ‘yes’; to those who say ‘no’, say ‘no’; ‘no’ and ‘yes’ belong to your mouths only; for Sai all is ‘yes, yes, yes’.