“He [John Huss] especially scourged the whole system of selling indulgences, as utterly at variance with the spirit of Christ and the teaching of the Gospel. The power of the priest to forgive sins rested only on repentance and contrition on the part of the guilty one; based on the payment of money or property, it was simony pure and simple, for had not the Savior said, “Freely ye have received, freely give?” The same thing applied to the pope, and the declaration made by some that the pope was infallible he declared to be not only false, but sacrilegious, for this would make the pope equal to Christ Himself. It goes without saying that these bold statements were not received without strenuous opposition on the part of the adherents of the hierarchy.” John Huss (c. 1372-1415) was a priest, professor, and eventually became a martyr. He died by being burned at the stake.”
Oscar Kuhns in John Huss: The Witness (Cincinnati: Jennings & Graham, 1907) 72-73.