Shariah is just another name of Islam and a pattern of thought and action given by Islam. It is a deen revealed by Allah and a way shown to us by The Prophet Muhammad (peace be upon him). It is complete code of life and presents solutions to all matters and the problems of life. Islam provides clear and unambiguous guidance for life.
In Arabic, Shariah means the clear, well-trodden path to water. The linguistic meaning of Shariah reverberates in its technical usage: just as water is vital to human life. So the clarity and uprightness of Shariah is the means of life for souls and minds. Islamically, it is used to refer to the matters of religion that God has legislated for His servants.
While the Sharia may be defined in a variety of ways, no definition that seeks to do justice to moslem thought can do without the key concept of ahkam, rendered here as ‘categorizations.’ The Sharia is, first and foremost, the totality of divine ‘categorizations of human acts’ (al-ahkam fi’l af’al, al-ahkam al-‘amaliya).
The moslems were in fact much more concerned with the explication of the concept of a divine categorization of an act, than with the explication of the concept of the Sharia as such. Frequently, rather than speaking simply of the Sharia, moslem scholars would speak of ‘Sharia categorizations’ (al-ahkam al-shar’iya).
When mankind had reached the stage of intellectual maturity and was ready to receive the last message from Allah Subhanahu wa Ta'ala. Islam came with its complete, comprehensive, and eternal Shariah (law) for the whole of mankind.