If there are going to be people out there making war on other people, don't you think it's a good idea for some of those people to at least follow a code of ethics? Not 'honor' but something you can pin down and be sure of, something with the same rules for everybody.
Constitutions should consist only of general provisions; the reason is that they must necessarily be permanent, and that they cannot calculate for the possible change of things.
But the best definition of it is to say that heaven is that state where we will always be with Jesus, and where nothing will separate us from Him any more.