This one is important, and perhaps the best explanation of this idea's practical implications is this clip from YouTube.
The philosopher Bastiat said it this way:
"Each of us has a natural right – from God – to defend his person, his liberty, and his property. These are the three basic requirements of life, and the preservation of any one of them is completely dependent upon the preservation of the other two. For what are our faculties but the extension of our individuality? And what is property but and extension of our faculties?" (The Law, p.6)
I love the litmus test that Ezra Taft Benson recommended in his essay, The Proper Role of Government:
An important test I use in passing judgment upon an act of government is this: If it were up to me as an individual to punish my neighbor for violating a given law, would it offend my conscience to do so? Since my conscience will never permit me to physically punish my fellow man unless he has done something evil, or unless he has failed to do something which I have a moral right to require of him to do, I will never knowingly authorize my agent, the government to do this on my behalf.
I realize that when I give my consent to the adoption of a law, I specifically instruct the police – the government – to take either the life, liberty, or property of anyone who disobeys that law. Furthermore, I tell them that if anyone resists the enforcement of the law, they are to use any means necessary – yes, even putting the lawbreaker to death or putting him in jail – to overcome such resistance. These are extreme measures but unless laws are enforced, anarchy results.