Justice is happiness according to virtue.

Political philosophy is realistically utopian when it extends what are ordinarily thought to be the limits of practicable political possibility and, in so doing, reconciles us to our political and social condition. Our hope for the future of our society rests on the belief that the social world allows a reasonably just Society of Peoples.

We must choose for others as we have reason to believe they would choose for themselves if they were at the age of reason and deciding rationally.

The good of political life is the good of free and equal citizens recognizing the duty of civility to one another and supporting the institutions of a constitutional regime.

Now the good of political life is a great political good. It is not a secular good specified by a comprehensive doctrine like those of Kant or Mill. You could characterize this political good as the good of free and equal citizens recognizing the duty of civility to one another: the duty to give citizens public reasons for one's political actions.

Ideal legislators do not vote their interests.

Justice as fairness provides what we want.