The book of Proverbs ends with the writings of a man named Agur. His writings are included with the writings of Solomon, the second wisest man to ever live, because Agur's words are wise also. "Every word of God is pure; He is a shield to those who put their trust in Him. Do not add to His words, lest He rebuke you, and you be found a liar" (Proverbs 30:5-6). This inspired passage says that every word of God is pure, from a Hebrew word meaning "tested, refined, found pure." So every word which God has inspired has been carefully chosen and refined beforehand by the Almighty God. There are no mistakes in the words which He has revealed, because they have been carefully chosen to exactly and completely convey His meaning to those who choose to put their trust in Him. For those who choose to trust in Him and His word, He is a shield, a protector. But notice the words of warning, not to add to the words which He has revealed. This is not the first or last time we run into such language in Scripture. In fact, if you place your finger at the first occurrence in Deuteronomy 4:2, another finger here at Proverbs 30:5-6, and one more finger where this language appears again in Revelation 22:18-19, it becomes clear that these warnings are placed at the beginning, in the middle, and at the end of our Bibles today. It would be very hard to miss these warnings, unless we are careless in our approach to the word of God.