Sola scriptura (Latin 'by Scripture alone') is one of five important slogans of the Protestant Reformation in the 16th century. It meant that Scripture is the Church's only infallible rule for deciding issues of faith and practices that involve doctrines.
“I have but one candle of life to burn, and I would rather burn it out in a land filled with darkness than in a land flooded with light.” - John Keith Falconer