A Constitution is the state of mind that constitutes the state of health of a being, a body or an entity.
A healthy constitution allows a healthy body, whether an individual entity or a body of people.
A healthy body requires a strong personal foundation.
A strong personal foundation requires a set of healthy beliefs or core principles.
A Constitution sets out the principles to which a body, a body of people or a nation will conform healthily and of sound mind.
It is not a set of rules or laws but a set of guiding principles or principle guide lines with which all laws & rules are in alignment.
When a Government passes laws that align with its Constitution it is both constitutional & lawful.
When a Government passes & enforces laws that are unconstitutional, the government is unhealthy and undermines the constitution of the people.