The Preamble to a Constitution embodies the fundamental values and the philosophy, on which the Constitution is based, and the aims and objectives, which the founding fathers of the Constitution enjoined the polity to strive to achieve. The importance and utility of the Preamble has been pointed out in several decisions of the Supreme Court of India.
Though, by itself, it is not enforceable in Court of Law , the Preamble to a written Constitution states the objects which the constitution seeks to establish and promote and also aids the legal interpretation of the Constitution where the language is found to be ambiguous .The Preamble to our Constitution serves, two purposes:
(a) It indicates the source from which the constitution derives its authority:
(b) It also states the objects which the constitution seeks to establish and promote.
The words- We, the people of India adopt, enact and give to ourselves this Constitution?, thus, declare the ultimate sovereignty of the people of India and that the constitution rests on their authority . Sovereignty means the independent authority of a state. It means that it has the power to legislate on any subject; and that is not subject to the control of any other state or external power. The Preamble declares, therefore, in unequivocal terms that the source of all authority under the Constitution is the people of India and that there is no subordination to any external authority. It means a government by the people and for the people.