“An unjust law is a code that is out of harmony with the moral law. To put it in the terms of St. Thomas Aquinas: An unjust law is a human law that is not rooted in eternal and natural law”. – Martin Luther King Jr.
And to further quote Thomas Aquinas, “In some cases, it is bad to follow the law, and it is good to set aside the letter of the law and to follow the dictates of justice and the common good”.
And to put it in a musical perspective, because music and life are the same, dissonance and harmony are essential to beautiful music. But if dissonance is never resolved to harmony, you will probably want to turn off the music. We can’t just turn this dissonance off though. We must participate in the composition. Harmony happens when the notes we play line up with the harmonics of the other notes being played. Sometimes we need to raise our voices in dissonance to the melody being played, being ever mindful of the harmony we are aiming for.