What did Rousseau mean when he stated that if any individual wants to pursue his own self interests at the expense of the common good He will be forced to be free?

Rousseau maintains that the state forms by means of a mutually-agreed-upon social contract. Once all the members of the state enter into that contract, they have to abide by its rules. So if I enter into the social contract with you, but I decide that I want to eat some tomatoes planted in your garden, to pursue my own self-interest, I might go steal your tomatoes. But it's not in the interest of the commonwealth that anyone steal from anyone else--so I'm pursuing my own interest at the expense of the common good (as well as at the expense of yours). I am forced to obey the rules of the commonwealth, because I agreed to the terms when I signed up. Rousseau's notion of personal liberty is not that everyone be free to do what he or she wants, but that everyone be free in the sense of *secure*.

So, I, the tomato thief, am "forced" to obey the rules of the commonwealth, which includes not stealing from you. In return, I live in the security provided by that commonwealth, which is the ultimate form of freedom, according to Rousseau.

Quoted from Elizabeth