Washington (CNN) -- Here are some key quotes from the Supreme Court's important ruling Wednesday striking down a significant section of a federal law on same-sex marriage. The Defense of Marriage Act (DOMA) denies more than a thousand federal benefits to legally married gay and lesbian couples, benefits enjoyed by heterosexual couples.
From the majority opinion by Justice Anthony Kennedy (supported by Justices Ruth Bader Ginsburg, Stephen Breyer, Sonia Sotomayor, and Elena Kagan):
-- "Although Congress has great authority to design laws to fit its own conception of sound national policy, it cannot deny the liberty protected by the Due Process Clause of the Fifth Amendment."
-- "When New York adopted a law to permit same-sex marriage, it sought to eliminate inequality; but DOMA frustrates that objective through a system-wide enactment with no identified connection to any particular area of federal law. DOMA writes inequality into the entire United States Code."
-- "The particular case at hand concerns the estate tax, but DOMA is more than a simple determination of what should or should not be allowed as an estate tax refund. Among the over 1,000 statutes and numerous federal regulations that DOMA controls are laws pertaining to Social Security, housing, taxes, criminal sanctions, copyright, and veterans' benefits."
-- "DOMA's principal effect is to identify a subset of state-sanctioned marriages and make them unequal. The principal purpose is to impose inequality, not for other reasons like governmental efficiency. Responsibilities, as well as rights, enhance the dignity and integrity of the person. And DOMA contrives to deprive some couples married under the laws of their State, but not other couples, of both rights and responsibilities."
-- "DOMA divests married same-sex couples of the duties and responsibilities that are an essential part of married life and that they in most cases would be honored to accept were DOMA not in force."
-- "What has been explained to this point should more than suffice to establish that the principal purpose and the necessary effect of this law are to demean those persons who are in a lawful same-sex marriage. This requires the Court to hold, as it now does, that DOMA is unconstitutional as a deprivation of the liberty of the person protected by the Fifth Amendment of the Constitution."
-- "This opinion and its holding are confined to those lawful marriages."
From the oral and written dissent by Justice Antonin Scalia (supported by Justice Clarence Thomas and in part by Chief Justice John Roberts):
-- "Few public controversies touch an institution so central to the lives of so many, and few inspire such attendant passion by good people on both sides. Few public controversies will ever demonstrate so vividly the beauty of what our Framers gave us, a gift the Court pawns today to buy its stolen moment in the spotlight: a system of government that permits us to rule ourselves."
-- "Some will rejoice in today's decision, and some will despair at it; that is the nature of a controversy that matters so much to so many. But the Court has cheated both sides, robbing the winners of an honest victory, and the losers of the peace that comes from a fair defeat. We owed both of them better. I dissent."
-- "This case is about power in several respects. It is about the power of our people to govern themselves, and the power of this Court to pronounce the law. Today's opinion aggrandizes the latter, with the predictable consequence of diminishing the former. We have no power to decide this case. And even if we did, we have no power under the Constitution to invalidate this democratically adopted legislation. The Court's errors on both points spring forth from the same diseased root: an exalted conception of the role of this institution in America."
-- "The Court is eager -- hungry -- to tell everyone its view on the legal question at the heart of this case. Standing in the way is an obstacle, a technicality of little interest to anyone but the people of We the People, who created it as a barrier against judges' intrusion into their lives."
-- "By formally declaring anyone opposed to same-sex marriage an enemy of human decency, the majority arms well every challenger to a state law restricting marriage to its traditional definition. ... The result will be a judicial distortion of our society's debate over marriage -- a debate that can seem in need of our clumsy 'help' only to a member of this institution."
-- "In the majority's telling, this story is black-and-white: Hate your neighbor or come along with us. The truth is more complicated. It is hard to admit that one's political opponents are not monsters, especially in a struggle like this one, and the challenge in the end proves more than today's Court can handle. Too bad. A reminder that disagreement over something so fundamental as marriage can still be politically legitimate would have been a fit task for what in earlier times was called the judicial temperament. We might have covered ourselves with honor today, by promising all sides of this debate that it was theirs to settle and that we would respect their resolution. We might have let the People decide."
-- "When the Court declared a constitutional right to homosexual sodomy (2003), we were assured that the case had nothing, nothing at all to do with 'whether the government must give formal recognition to any relationship that homosexual persons seek to enter.' Now we are told that DOMA is invalid because it 'demeans the couple, whose moral and sexual choices the Constitution protects.' ... It takes real cheek for today's majority to assure us, as it is going out the door, that a constitutional requirement to give formal recognition to same-sex marriage is not at issue here -- when what has preceded that assurance is a lecture on how superior the majority's moral judgment in favor of same-sex marriage is to the Congress's hateful moral judgment against it. I promise you this: The only thing that will 'confine' the Court's holding is its sense of what it can get away with."
From the dissent by Justice Samuel Alito (supported by Thomas):
-- "Section 3 of DOMA, in my view, does not encroach on the prerogatives of the states, assuming of course that the many federal statutes affected by DOMA have not already done so. Section 3 does not prevent any state from recognizing same-sex marriage or from extending to same-sex couples any right, privilege, benefit, or obligation stemming from state law. All that Section 3 does is to define a class of persons to whom federal law extends certain special benefits and upon whom federal law imposes certain special burdens. In these provisions, Congress used marital status as a way of defining this class -- in part, I assume, because it viewed marriage as a valuable institution to be fostered and in part because it viewed married couples as comprising a unique type of economic unit that merits special regulatory treatment. Assuming that Congress has the power under the Constitution to enact the laws affected by Section 3, Congress has the power to define the category of persons to whom those laws apply."