Which Article of the Indian Constitution did Dr. B.R. Ambedkar term as the 'Heart and Soul of the Indian Constitution'?

A mere declaration of fundamental rights in the Constitution is meaningless, useless and worthless without providing an effective machinery for their enforcement, if and when they are violated. Hence, Article 32 confers the right to remedies for the enforcement of the fundamental rights of an aggrieved citizen. In other words, the right to get the Fundamental Rights protected is in itself a fundamental right. This makes the fundamental rights real. That is why Dr. B.R. Ambedkar called Article 32 as the most important article of the Constitution—‘an Article without which this constitution would be a nullity. It is the very soul of the Constitution and the very heart of it’.