“All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be complete, equipped for every good work” (2 Timothy 3:16-17).
Everyone believes something, and everyone acts according to their true beliefs. What is the most important thing in your life? What is your highest goal? What will happen to you after you die? Your answers to questions like these form your core beliefs, and your life will reflect what you really believe (not what you merely say you believe).
With this in mind, a very important question to ask about what you believe and do is, “Why?” Why do you believe this and not that? Why do you invest yourself here and not there?
Sola Scriptura (or Scripture Alone) is the doctrine (or teaching) which affirms that Scripture alone is God’s perfect and sufficient word to humanity. This means there is an objective and unchanging answer to the biggest “why” questions of life. Christians throughout history have understood that God’s word alone is the infallible rule of faith and practice (beliefs and actions). We praise and thank God for His sure and trustworthy word.