Rev. Martin Luther King, Jr., reflected on concept in Romans 13 in his “Letter from Birmingham Jail,” 1963: "One may well ask: 'How can you advocate breaking some laws and obeying others?' The answer lies in the fact that there are two types of laws: just and unjust ... How does one determine whether a law is just or unjust? A just law is a man made code that squares with the moral law or the law of God."
Booker T. Washington wrote in My Larger Education-Being Chapters from My Experience (1911): "There is a certain class of race-problem solvers who do not want the patient to get well, because as long as the disease holds out they have not only an easy means of making a living, but also an easy medium through which to make themselves prominent before the public."
Thomas Cooley wrote in his General Principles of Constitutional Law, 1890: "The Christian religion was always recognized in the administration of the common law of the land, the fundamental principles of that religion must continue to be recognized in the same cases and to the same extent as formerly."