2 Timothy 3:16-17(New Living Translation)
16 All Scripture is inspired by God and is useful to teach us what is true and to make us realize what is wrong in our lives. It corrects us when we are wrong and teaches us to do what is right. 17 God uses it to prepare and equip his people to do every good work.
Today is Reformation Day, the birthday of the Protestant Church. On this day in 1517, Martin Luther, a Catholic priest, wrote to Albrecht, Archbishop of Mainz and Magdeburg, protesting against the sale of indulgences. He enclosed in his letter a copy of his "Disputation of Martin Luther on the Power and Efficacy of Indulgences," which came to be known as The 95 Theses. These he nailed to the door of All Saints Church in Wittenberg, Germany, and began the events that changed the Christian world forever.
The most important theological truth that the Reformation was the belief that Scripture alone—not human traditions or the rulings of a church—held complete authority for Christians (“sola scriptura”), and that salvation was a free gift of God that could not be earned by good deeds. The Catholic church at the time was "selling salvation" and profiting from the poor by doing so. They also made sure that the Bible remained in Latin, and the common man of the day was unable to read it for himself.
As a result of the Reformation, and the work of Martin Luther, John Calvin, Ulrich Zwingli, and John Knox, the Bible was translated and printed in the language the common way, opening the way for generations and millions of people to come to the saving knowledge of Jesus Christ.