Firstly, sola scriptura meant Scripture was the supreme authority over the church. It did not mean Scripture was the only authority. Luther, Calvin, and the other reformers used other authorities like reason and tradition. They developed arguments using logic (reason) and learned from the writings of past Christians (tradition) as they explored the Bible. Yet the Bible was the supreme authority that ruled reason and tradition because Scripture alone was infallible precisely because it is God’s word. All other authorities (including church leadership) were fallible and must submit to Scripture. As Heinrich Bullinger said: “As God’s word is confirmed by no human authority, so no human power is able to weaken its strength”[Ok god is not the bible but he is the word]The bible is the staff ]god is the shepherd