Out of all the multifarious things existing in this world...
Out of all the multifarious things existing in this world, the animals or at least the advanced animals are more or less endowed with this quality that when they feel an urge, they try knowingly to fulfill what they want. Out of all the animals known to us man has the most developed willpower. That is why knowledge has a more creative role in his life than in the life of other animals. Anyhow, he apparently does not exercise his will while performing many acts.
His circulatory, respiratory and digestive system and his big and small glands which produce the necessary chemicals, all work without the aid of his will. There is no doubt that all these systems are connected with the nervous system, and modern physiology has been able to discover for each of them a centre of command in some part of the brain, still every act having some connection with brain cannot be called intentional and deliberate.
It has been reported that some persons consequent on certain exercises and long practice have been able to control the circulation of their blood. Even if such reports be true, they can at best be described as exceptional cases. Anyhow, the field of the activity of man's will is after all limited. For example, so far his will has not been able to influence the rotatory system of the heavenly bodies.
We also see that every human being has some hereditary traits in the selection of which his conscious will has no part to play. Hence, the influence of human will and volition is after all limited. That is why it often happens that man intends to do a thing, but he does not succeed, or certain factors beyond his control prevent the fulfillment of his many desires. But Allah who is All‑knowing and All‑powerful, accomplishes all that He wants. "Surely, Your Lord does what He pleases".
(Surah Hud, 11:107). "Only Allah can bring punishment on you, if He will, and you cannot frustrate His plan ". (Sura Hud **, 11: 3 3 )** . His will rules over the whole world, but that is not the case with that of others. "Allah will judge with fairness, and those whom they invoke besides Him can judge nothing". (Surah Mu'min, 40:20 **)** . All others whosoever and whatsoever they may be, move within a limited framework decreed for them by Allah, who has destined everything.
`Allah has set a measure for everything ". (Surah al‑Talaq, 65: 3 etc.) This is the universal law which applies to man also.