A living breathing Constitution is useless. We need the fixed reference point that the Constitution provides. It provides a clear outline of principles that make up our political creed.
For Further Reading
“Though written constitutions may be violated in moments of
passion or delusion, yet they furnish a text to which those who
are watchful may again rally and recall the people. They fix,
too, for the people the principles of their political creed.”
–Thomas Jefferson to Joseph Priestley, 1802.
Constitutional Sleight of Hand: The Evolution of Implied Powers
Constitution 101: Living and Breathing is the Same as Dead