Man is faced with a time when his physical form begins to weaken and this is known as old age. At this time, the eyes lose their ability to see, while the ears are unable to hear. In summary, every part of the body becomes almost useless and incapable. Remember that there are two forms of old age: natural and unnatural. The natural form is as we have described just now. The unnatural form is when a person neglects the illnesses that they suffer from. In turn, such a person grows weak and begins to enter into old age prematurely, as it were. As this is the phenomenon in the physical realm, so too is the case in the inner, spiritual realm. If a person does not endeavour to transform their immoral ways into exemplary morals and good qualities, their moral compass is shattered completely. The guidance of the Messenger of Allah, peace and blessings of Allah be upon him, and the teaching of the Holy Quran, clearly prove the fact that every illness has a cure. However, if indolence and sloth overtake a person, what other avenue is there except for ruin? If a person leads a life of carelessness like an old person, how can they be saved?
(Hazrat Mirza Ghulam Ahmadas, Malfuzat, Vol. 1, p. 133)