When Allah created man, He established an order and a system for each organ, and He ordained prohibitions for each organ, granted a blessing for fulfilling each of them, and specified a kind of pleasure and benefit that results from each one. If the servant acts while using each organ for the sake of Allaah and avoids the prohibitions, he would be praising Allaah for granting him the blessings of each organ and would complete the potential benefit and pleasure from each one. But if he neglects the orders of Allaah and His prohibitions, Allaah will not allow him to benefit from any of them and moreover, He will make it a cause of pain and harm.
Each organ of the body has the duty to worship Allaah at all times, which will bring one closer to Him. If he keeps himself busy with worship, he will be close to Allaah, but if he is busy with his desires, seeking relief, or being idle, he will fail. The servant is constantly fluctuating between being close to Allaah and being far from Him. Allaah, the Exalted says,
“To any of you that chooses to go forward (by working righteous deeds), or to remain behind (by committing sins).” (AI-Muddathir, 74:37)