It might not be October 31 yet, but we're already in celebration mode! After all, 2017 marks 500 years since that turning-point day in the Church when Augustinian monk Martin Luther nailed his 95 Theses to the church door in Wittenberg, Germany. With the providential invention of Gutenberg's printing press, Luther's grievances and desires for reform in the Roman Catholic church were spread near and far. After that pivotal event in 1517, Luther and other Reformers went on to esh out those principles of the Reformation that are non-negotiables when it comes to understanding how God has saved us. Hence, we have the Solas of the Reformation.