Dr. King makes more subtle reference in this Bible passage. This biblical allusion provides a moral basis for King’s argument. We know that we will all face problems and trials in life and some of these are completely beyond our control. These are all trials that test our faith. Anyone can have faith in God during fair weather but the true test of our faith is how we respond during stormy weather, when we can’t see our hands in front of our face. Christ should be our example during our times of pain, mental anguish and suffering. Though we will endure trials, God promised in Psalm 30:5 that weeping only comes for a night but joy comes in the morning.
As we walk, we must make the pledge that we shall always march ahead. We cannot turn back. There are those who are asking the devotees of civil rights, "When will you be satisfied?" We can never be satisfied as long as the Negro is the victim of the unspeakable horrors of police brutality. We can never be satisfied, as long as our bodies, heavy with the fatigue of travel, cannot gain lodging in the motels of the highways and the hotels of the cities. We cannot be satisfied as long as the Negro's basic mobility is from a smaller ghetto to a larger one. We can never be satisfied as long as our children are stripped of their selfhood and robbed of their dignity by signs stating "For Whites Only". We cannot be satisfied as long as a Negro in Mississippi cannot vote and a Negro in New York believes he has nothing for which to vote. No, no, we are not satisfied, and we will not be satisfied until justice rolls down like waters and righteousness like a mighty stream.
Because King's speech was broadcast to a large radio and television audience, there was controversy about the copyright status of the speech. If the performance of the speech constituted "general publication", it would have entered the public domain due to King's failure to register the speech with the Registrar of Copyrights. If the performance only constituted "limited publication", however, King retained common law copyright. This led to a lawsuit, Estate of Martin Luther King, Jr., Inc. v. CBS, Inc. , which established that the King estate does hold copyright over the speech and had standing to sue; the parties then settled. Unlicensed use of the speech or a part of it can still be lawful in some circumstances, especially in jurisdictions under doctrines such as fair use or fair dealing. Under the applicable copyright laws, the speech will remain under copyright in the United States until 70 years after King's death, thus until 2038.