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Since time consists of perception, it depends entirely on the perceiver and is therefore relative.

The speed at which time flows differs according to the references we use to measure it because there is no natural clock in the human body to indicate precisely how fast time passes. As Lincoln Barnett wrote: "Just as there is no such thing as color without an eye to discern it, so an instant or an hour or a day is nothing without an event to mark it."

In some other verses it is stated that time may flow at different paces in different settings:

Yet they ask thee to hasten on the Punishment! But Allah will not fail in His Promise. Verily a Day in the sight of thy Lord is like a thousand years of your reckoning. (Surat al-Hajj, 47)

The angels and the spirit ascend unto him in a day the measure whereof is (as) fifty thousand years. (Surat al-Maarij, 4)

These verses are all manifest expressions of the relativity of time. The fact that this result only recently understood by science in the 20th century was communicated to man 1,400 years ago by the Qur’an is an indication of the revelation of the Qur’an by Allah, Who encompasses the whole time and space.

Lincoln Barnett explains how the Theory of General Relativity leads to this fact in The Universe and Dr. Einstein: According to Barnett, the universe can be "encompassed in its entire majesty only by a cosmic intellect". The will that Barnett calls "the cosmic intellect" is the wisdom and knowledge of Allah, Who prevails over the entire universe.
These statements point at a very important fact: matter’s lack of any physical reality alarms materialists who hold matter to be an absolute thing. For true believers, the case is just the opposite: people of faith become very glad when they have perceived the true nature of the world because this reality is the key to all questions. With this key, all secrets are unlocked. One comes to easily understand many issues that he previously had difficulty in understanding. As said before, the questions of death, paradise, hell, the hereafter, changing dimensions, and human such as "Where is Allah?", "What was before Allah?", "Who created Allah?", "How long will the life in cemetery last?", "Where are heaven and hell?", and "Where do heaven and hell currently exist?" will be easily answered because it will be understood with what kind of a system Allah created the entire universe from nothingness.