Constitution: Why and How?

In a discussion on the experience of the working of our Constitution,
three speakers took three different positions:
a. Harbans: The Indian Constitution has succeeded in giving us a
framework of democratic government.
b. Neha: The Constitution made solemn promises of ensuring
liberty, equality and fraternity. Since this has not happened,
the Constitution has failed.
c. Nazima: The Constitution has not failed us. We have failed the
Constitution.
Do you agree with any of these positions? If yes, why? If not,
what is your own position?