What is the main goal of the Constitution as stated in the preamble

A preamble is an introductory statement in a document that explains the document’s philosophy and objectives.
In a Constitution, it presents the intention of its framers, the history behind its creation, and the core values and principles of the nation.
The preamble basically gives idea of the following things/objects:
Source of the Constitution
Nature of Indian State
Statement of its objectives
Date of its adoption

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