The document summarizes key aspects of the Indian constitution's preamble and philosophy. It discusses how the preamble lays out the constitution's objectives of sovereignty, democracy, justice, liberty, equality and integrity. It notes that the preamble was amended in 1976 to add "socialist" and "secular". It also outlines some of the constitution's salient features, including that it is the world's longest written constitution, draws from various international models, blends rigidity and flexibility, establishes a federal system with a unitary bias, adopts a parliamentary form of government, synthesizes parliamentary sovereignty and judicial supremacy, upholds the rule of law, and establishes an integrated and independent judiciary.