A person may gain or lose considerable weight...
A person may gain or lose considerable weight, necessitating some changes in the measurement of his clothes. Therefore, now can you say that there will never be any need for a new Shari'ah after Islam? Answer: Clothes usually do not adjust themselves according to the build of a body. But Islam has a built-in capacity to cover all the possible situations which a man faces during his life-time.
In this respect, we may compare it with those sophisticated electronic devices which automatically adjust to the temperature, light, humidity and other relevant factors of the operating time. If you take a good camera, you will find that its lens makes all the necessary adjustments according to the distance and light without any need for you to make those adjustments manually.
Likewise, Islam has all the rules for all the possible situations, and as soon as a given situation changes, the Shari'ah' automatically recognizes the change and another set of rules applicable to the new situation comes into force immediately and automatically. This flexibility is the unique feature of Islam which is not found in any other religion. And this feature eliminates the need of a new Shari'ah.
Of course, the need for an interpreter of the Qur'an and protector of the Shari'ah will remain forever. But Allah appointed Imams for this purpose, after the Last Prophet. The chain of the Prophethood came to an end and a new system of religious leadership, known as 'Imamat' was introduced. The Holy Prophet said "Bani Israel, prophets were leading them; when a prophet died another prophet succeeded him. But after me there is no prophet, and surely there will be Caliphs". Previous…