A court is only as sound as its jury, and a jury is only as sound as the men who make it up.
 Harper Lee, To Kill a Mockingbird (1960). copy citation

Context

““I’m no idealist to believe firmly in the integrity of our courts and in the jury system—that is no ideal to me, it is a living, working reality. Gentlemen, a court is no better than each man of you sitting before me on this jury. A court is only as sound as its jury, and a jury is only as sound as the men who make it up. I am confident that you gentlemen will review without passion the evidence you have heard, come to a decision, and restore this defendant to his family. In the name of God, do your duty.” Atticus’s voice had dropped, and as he turned away from the jury he said something I did not catch.” source