Which phrase embodies the idea of self-governance as mentioned in the Constitution?

The phrase "We The People" embodies the idea of self-governance because it emphasizes that the authority of the government is derived from the people themselves. This notion is foundational to democratic principles, indicating that the power and legitimacy of government come from the citizens rather than an external authority.

In the context of the Constitution, this phrase sets the tone for the entire document, suggesting that the formation of the government is a collective effort by the populace to create a system that represents their will and interests. It signifies a commitment to popular sovereignty, where the citizens are actively involved in governance, decision-making, and the establishment of laws.

The other options, while important in their own right, do not directly encapsulate the concept of self-governance in the same way. "In Congress Assembled" refers to a specific legislative context, and "We hold these truths" is part of a declaration that asserts certain rights rather than focusing on the concept of governance by the people. "To ensure domestic tranquility" speaks to the goals of government but does not encapsulate the foundational idea of authority resting with the people.