What concept did John Hus believe?

John Hus believed in the reform of the Church and emphasized the authority of Scripture over Church tradition. He advocated for the need for moral integrity among clergy and the importance of preaching the Gospel in the language of the people. Hus also argued for the idea of communion in both kinds (bread and wine) for all believers, challenging the practices of the Church at the time. His beliefs ultimately led to his execution for heresy, but they laid the groundwork for later Protestant Reformation movements.