The statement accurately reflects the genesis of the Indian Constitution. It was not an overnight creation but the culmination of a long historical process, drawing heavily from various constitutional developments and experiences, both domestic and international. Its roots can be traced back to the British colonial administration in India.

Key constitutional antecedents include:

1. Government of India Act, 1935: This Act served as a major blueprint, providing the structural framework for federalism, provincial autonomy, emergency provisions, and the administrative machinery. Many provisions were directly adopted or adapted.
2. Earlier British Acts: The Indian Councils Acts (1861, 1892, 1909), Montagu-Chelmsford Reforms (1919), and other legislative measures gradually introduced representative elements, bicameralism, and a degree of Indian participation in governance, laying the groundwork for parliamentary democracy.
3. Nationalist Movement's Demands: The ideals and aspirations of the Indian nationalist movement, articulated in documents like the Nehru Report (1928) and the Karachi Resolution (1931), significantly influenced the inclusion of fundamental rights, universal adult franchise, and socio-economic justice.
4. Global Constitutions: The Constituent Assembly meticulously studied various world constitutions. For instance, fundamental rights were inspired by the US Constitution, Directive Principles of State Policy by the Irish Constitution, parliamentary system by the British, and federalism with a strong center by Canada.

Thus, the Indian Constitution is a synthesis of indigenous political thought, colonial administrative legacy, and global constitutional wisdom, meticulously debated and crafted by the Constituent Assembly to suit India's unique context.