ADDED: I wondered if Justice Scalia had ever quoted the play "A Man for All Season" in an opinion. I think the answer is no, but he joined a dissenting opinion, written by Chief Justice Roberts, in Armour v. City of Indianapolis, 132 S. Ct. 2073 (2012):
Indiana law requires that the costs of sewer projects be “apportioned equally among all abutting lands.” Ind. Code §36-9-39-15(b)(3). The City has instead apportioned the costs of the Brisbane/Manning project such that petitioners paid between 10 and 30 times as much as their neighbors. Worse still, it has done so in order to avoid administrative hassle and save a bit of money. To paraphrase A Man for All Seasons: “It profits a city nothing to give up treating its citizens equally for the whole world . . . but for $300,000?” See R. Bolt, A Man for All Seasons, act II, p. 158 (1st Vintage Int'l ed. 1990).The quote de-paraphrased: "It profits a man nothing to give his soul for the whole world ... but for Wales, Richard?" And to get back to Jesus: "For what is a man profited, if he shall gain the whole world and lose his own soul?"
I also found a Stevens dissent — that Justice Scalia did not join — with what I think is a more familiar "Man for All Seasons" quote, in Nat'l Ass'n of Home Builders v. Defenders of Wildlife (2007)(quoting an earlier case in which Chief Justice Burger used the quote):
At the risk of plagiarizing Chief Justice Burger's fine opinion, I think it is appropriate to end my opinion just as he did--with a quotation attributed to Sir Thomas More that has as much relevance today as it did three decades ago....
"The law, Roper, the law. I know what's legal, not what's right. And I'll stick to what's legal.... I'm not God. The currents and eddies of right and wrong, which you find such plain-sailing, I can't navigate, I'm no voyager. But in the thickets of the law, oh there I'm a forester. . . . What would you do? Cut a great road through the law to get after the Devil?... And when the last law was down, and the Devil turned round on you--where would you hide, Roper, the laws all being flat?... This country's planted thick with laws from coast to coast--Man's laws, not God's--and if you cut them down... d'you really think you could stand upright in the winds that would blow then?... Yes, I'd give the Devil benefit of law, for my own safety's sake." R. Bolt, A Man for All Seasons, Act I, p 147 (Three Plays, Heinemann ed. 1967) (quoted in Hill, 437 U.S., at 195, 98 S. Ct. 2279, 57 L. Ed. 2d 117).