III. And although we well know that this Assembly, elected by the people for the ordinary purpose of legislation only, have no power to restrain the acts of succeeding assemblies, constituted with powers equal to our own, and that therefore to declare this act to be irrevocable [impossible to invalidate or take back] would be of no effect in law; yet we are free to declare, and do declare, that the rights hereby asserted are of the natural rights of mankind, and that if any act shall hereafter be passed to repeal the present, or to narrow its operation, such an act will be infringement of natural right. Summarize What are the main points made in Article III?