Following is my current summary of the teaching of the Five “Solas” that arose during the Protestant Reformation as a response to the teachings of the Roman Catholic Church whom the reformers believed had usurped the authority of God in various ways.
Sola scriptura ("by Scripture alone")
The Bible is the only authoritative word of God and source of teaching for the life and faith of believers. Rejects the claim that the authority of the Majesterium (church embodied in the episcopacy) is equal to Scripture.