“What security have you for your own safety if every man of vile temper, of low instincts, of base purpose, can find in his own heart a higher law than that which is the rule of society, the Constitution, and the Bible? These higher-law preachers should be tarred and feathered, and whipped by those they have thus instigated. This, my friends, is what was called in good old revolutionary times, Lynch Law. It is sometimes the very best law, because it deals summary justice upon those who would otherwise escape from all other kinds of punishment.”

The trial of Charles B. Reynolds for blasphemy (1887)
Context: There is a constitution higher than any statute. There is a law higher than any constitution. It is the law of the human conscience, and no man who is a man will defile and pollute his conscience at the bidding of any legislature. Above all things, one should maintain his self-respect, and there is but one way to do that, and that is to live in accordance with your highest ideal.

Napoleon the Little (1852), Book VIII, IV
Napoleon the Little (1852)

1960s, What Has Happened to America? (1967)

Speech, United States Senate (11 March 1850).
Context: It is true, indeed, that the national domain is ours. It is true that it was acquired by the valor and with the wealth of the whole nation. But we hold no arbitrary authority over it. We hold no arbitrary authority over anything, whether lawfully acquired or seized by usurpation. The constitution regulates our stewardship; the constitution devotes the domain to union, to justice, to defense, to welfare and to liberty.
But there is a higher law than the Constitution, which regulates our authority over the domain, and devotes it to the same noble purposes.

Address before the Federal Council of Churches of Christ in America. December 6, 1933 http://www.presidency.ucsb.edu/ws/index.php?pid=14574
1930s

Radio broadcast (October 1941)

Ten Sermons of Religion (1853), III : Of Justice and the Conscience https://en.wikisource.org/wiki/Ten_Sermons_of_Religion/Of_Justice_and_the_Conscience
Context: Justice is the constitution or fundamental law of the moral universe, the law of right, a rule of conduct for man in all his moral relations. Accordingly all human affairs must be subject to that as the law paramount; what is right agrees therewith and stands, what is wrong conflicts and falls. Private cohesions of self-love, of friendship, or of patriotism, must all be subordinate to this universal gravitation towards the eternal right.

Source: The Status Civilization (1960), Chapter 15 (p. 65)

The trial of Charles B. Reynolds for blasphemy (1887)
Context: There is a law higher than men can make. The facts as they exist in this poor world -- the absolute consequences of certain acts -- they are above all. And this higher law is the breath of progress, the very outstretched wings of civilization, under which we enjoy the freedom we have. Keep that in your minds. There never was a legislature great enough -- there never was a constitution sacred enough, to compel a civilized man to stand between a black man and his liberty. There never was a constitution great enough to make me stand between any human being and his right to express his honest thoughts. Such a constitution is an insult to the human soul, and I would care no more for it than I would for the growl of a wild beast.