The introduction given in the beginning of every constitution is a fundamental necessity. The introduction of the constitution expresses the fundamental philosophy of the constitution. The introduction also has its legal importance. The introduction of the Indian Constitution is called the preamble. The preamble of the constitution of India is a brief introductory statement that sets out the guiding purposes and principles of the document and it indicates the source from which the document receives authority.
It means the people are the ultimate source of Authority. The hopes and aspiration of the people as well as the ideals before our nation are described in the preamble in clear words. It may be considered as the soul of the constitution. The Indian public have ultimate sovereignty and authority and the people govern through their representatives.
In preamble, several ideals and pious goals are declared and it is expected with hope that the government is accountable for the fulfillment of these hopes. In this way, the preamble in indirect way hints directives to the Government and controls its function.