Although heavenly religions are similar in principles and generalities...

Although heavenly religions are similar in principles and generalities, they are not same on an equal level; on the contrary from the aspect of depth of religious cognition and intellectual matters, in social rules and regulations, in the condition and kind of worship rituals etc. they are very much different from each other. Religions have gradually developed and spread through the ages.

The mentioned differences are effects of intellectual maturity and the level of knowledge of the people and the changes and transformations that occurred in the life of human beings. Learning and intellectual capacity of the ancient people was definitely not at the level of the present man. And from the aspect of individual and social life also, the ancient man was in no way like the man of today.

Religious knowledge, laws of faith and other matters were also sent by Almighty God to man through the channel of prophets in accordance to the capability of man and they spoke to people according their intellectual level.

Therefore the Prophet of Islam (S) said: We prophets have been commanded to speak to people in accordance with their intellectual level.[^5] Prophets through the ages, like loving parents held the hands of the people with determination and took them through development step by step till they reached the present level. Therefore as much man gained intellectual maturity as much advanced religious concepts were presented to him.

And in the same way, if they were in need of more advanced rules and regulations they were given as much advanced rules and regulations. Such advancement continued through the ages under the supervision and efforts of prophets till the time that the intellect and capacity of man reached to a level that he could understand the most complex religious concepts and knowledge; with this aim the Prophet of Islam was sent, so that he may remove this need of man.

The Holy Quran through the Prophet of Islam was revealed for the people so that it may convey to them the loftiest religious cognitions and realities and not only for the people of that time; on the contrary, the intellectuals of every age could benefit from it and they would never become old. The Holy Quran and the life history of the Prophet of Islam are two religious and scientific heritages that are handed over to Muslims.