The Preamble is a brief introductory statement that sets out the guiding principles and objectives of the Constitution. It declares India to be a sovereign, socialist, secular, democratic republic, and it ensures justice, liberty, equality and fraternity to all citizens.
The Preamble is the soul of the Indian Constitution and it reflects the ideals and aspirations of the people of India. It is the foundation on which the rest of the Constitution is built and it provides the basic principles that guide the interpretation and application of the Constitution.
The Preamble is the most important part of the Constitution and it is often referred to as the "keystone" of the Constitution because it holds together all the different parts of the Constitution and gives it a unified purpose and direction.