Why is the Preamble to the Constitution very important? Explain.

Preamble is an introductory statement to the Constitution which contains the ideals on which the Constitution is based and the basic underlying principles of the Constitution.
Importance of the Preamble can be stated as follows
(i) The Preamble contains the philosophy on which the entire Constitution has been built. It provides a standard to examine and evaluates any law and action of government to find out whether it is good or bad. Hence, it is the soul of the Constitution.
(ii) The Preamble shows the way the government ought to run. It declares India to be a sovereign, socialist, secular and democratic republic.
(iii) It envisages justice-social, economic and political-for all its citizens. It seeks to give the citizens all types of freedoms-freedom of thought and expression, freedom of belief and worship etc.
(iv) The Preamble mentions people as the source of the Constitution. It seeks to provide equality of status and opportunity to all individuals and thus promotes a sense of brotherhood among all citizens.