Since Islam is the last religion revealed by Allah, it possesses some elements that make it unique. One of these is its relevance for human beings regardless of place and time.

This means that Islam - submission to God - is a comprehensive institution which includes all the guidelines necessary for all aspects of life. Therefore, the best way to understand Islam is to look at it as more than a religion - as a complete way of life. In other words, it is a system which regulates every aspect of life, dealing with all issues - social, economic, educational, judicial, health, and even military. Thus, it is suitable for all human beings and for all times, since it is the final religion. Islamic law aims to achieve five goals for human beings in life: protecting the religion, protecting one's self, protecting one's possessions, protecting one's mind, and protecting one's offspring.

Therefore, God (Allah) decided on two main domains of law:

1. If the domain always requires change and progress, Allah legislated comprehensive yet flexible rules and gave people the chance to create and develop the necessary laws to satisfy the specific needs of a certain period of time. For example, in the rule of consultation (Shura), Allah decided that it should be the general rule for any government; however, its form and style are left open for people to choose and decide according to their needs.

2. If the domain does not require or lend itself to change or progress, Allah legislated fixed and detailed laws that govern all issues related to a specific area. Thus, there is no way for man to change or develop those laws, which were made for the welfare of all mankind. For example, the area of worshipping God contains fixed details which cannot be changed at all. These regard prayer, fasting, making pilgrimage, etc. Another example is in family matters, such as the laws of marriage, divorce, and inheritance.

"The world is green and beautiful, and Allah has appointed you as His stewards over it. He sees how you acquit yourselves."