The Messenger of Allah (sal Allahu alaihi wa sallam) said:
“A man might be deprived of a provision (that was written for him) because of a sin that he commits; Only supplication changes Al-Qadar (predestination) and only Birr (righteousness) can increase lifespan.” [Nasai]
This amazing Hadith informs us that sinning - disobeying Allah Almighty – puts up barriers in the path of our provision from reaching us and that it also reduces our lifespan. Just as righteousness increases ones blessings, sinning reduces it.
Can sins change our lives? Some points from “Al-Jawab Al-Kafi” by Imam Ibn Al-Qayyim Al-Jawziyah (rahimahullah) on the worldly consequences of sins:
Prevention of knowledge: Knowledge of the Deen is a light which Allah throws into the heart and the disobedience of Allah extinguishes this light. The light of Allah is not given to the disobedient. When the light of the intellect is extinguished it becomes weak and deficient.
Disobedience weakens the heart and the body.
The ill-effects of the sinner fall upon the people around him as well as the animals, as a result of which they are touched by harm.
During the reign of Umar (radi Allahu anhu) Madinah was shaken with an earthquake. Umar (radi Allahu anhu) said:
“O, people! What is this? How fast (how soon after the death of the Prophet) you committed a sin. If this (earthquake) happens again, I will never live among you.” [Ahmed]
Disobedience brings humiliation and lowliness. Every aspect of honor lies in the obedience of Allah.
When disobedience increases, the servant’s heart becomes sealed so that he becomes of those who are heedless. “But no! A stain has been left on their hearts on account of what they used to earn (that is, their actions).” [Quran: Surah Al-Mutaffifin, Ayat 14]
Sins cause various types of corruption to occur in the land: the spoiling of the water, the air, the plants, the fruit, and dwelling places. “Mischief has appeared on the land and the sea on account of what the hands of men have earned; that He may give them a taste of some of (the actions) they have done, in order that they may return (to righteousness).” [Quran: Surah Ar-Rum, Ayat 41]
Modesty disappears. Modesty is the essence of the life of the heart and is the basis of every good. Its disappearance is the disappearance of all that is good.
When a person sins, benevolence is removed from his heart.
Sins weaken and reduce the magnification of Allah the Almighty in the heart of the servants and so he sins even more.
Sins are the cause of Allah the Almighty abandoning His servant and leaving him to fend for himself against his soul and his Satan, and in this is destruction from which no deliverance can be hoped for.