Why does the speech sound inspirational to the jury in "The Devil and Daniel Webster"?

In Stephen Vincent Benet's "The Devil and Daniel Webster," the title character is a lawyer hired by a simple farmer who had sold his soul in exchange for good luck. Webster convinces the devil, called Mr. Scratch, to grant Jabez Stone a trial by jury before taking Stone's soul; he argues this on the grounds that Scratch violated Constitutional law in creating the contract with Stone in the first place.
During this trial, Webster gives a speech before the jury of men who were condemned to hell. Afterward, the jury's foreman announces the verdict in favor of Stone. He says that, even though Webster's argument provided virtually no evidence, "the damned may salute the eloquence" of the arguer. This means that, because Webster has delivered such a touching oration about the nature of mankind and its failings, the jury felt compelled to reward such beauty and poignancy, even if they thought Stone should have to pay the price of his soul.
The speech likely sounds inspirational to the jurors because they themselves are complex men like Stone who did both good and bad in life and likely feel that they didn't deserve eternal torment either. He makes them feel as though they have the power to grant a second chance that they themselves never got.