What is the reliable basis, the final authority, and perfect revelation of God in matters of faith, beliefs, and practices?
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"The law of the Lord is perfect, converting the soul: The testimony of the Lord is sure, making wise the simple" - Psalm 19: 7
"Every word of God is pure: he is a shield unto them that put their trust in Him. Add thou not unto his words, lest he reprove thee, and thou be found a liar" - Proverbs 30: 5
"But though we or an angel from heaven preach any other gospel unto you than that which we have preached unto you let him be accursed" - Galatians 1: 8
"For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book" - Revelation 22: 18