17. It is noteworthy that God attributes to Himself all that happens in the world as a result of the laws of nature. Since these laws were made by God Himself, the effects which result from their operation are also ultimately due to the will and permission of God. The refusal on the part of unbelievers to heed the call of the Truth even when it is clear and audible stems from their obstinacy, prejudice, mental rigidity and inertia. It is a law of nature that when a man is not prepared to rise above prejudice in his quest for the Truth, his heart closes to every truth which is opposed to his desires. We can describe this condition by saying that the heart of that person has become sealed and when God describes it He does so by saying that He had sealed the heart of the person concerned. The explanation of this Paradox is that whereas we describe merely an incident, God describes its ultimate cause.