"All Scripture is given by inspirtation of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:" ( 2 Tim. 3:16)
All Scripture is not only "God-breathed," they are also profitable (i.e. useful or helpful). Since God's word is profitable, then we can and should apply its truths to every area of our lives. Modernists would scoff and say we can't use the Bible in math, or history, or 'science.' And conclude therefore that the Bible can't be used in our 'every day lives.' The problem is that the Bible is not written as a textbook on those subject matters, and to treat the Bible as a 'textbook' is really not to esteem the Bible as God's Word. I am not saying the Bible does not have factual data (meaning it contain facts about science, history, chronology, etc.) because it does. And when and where it speaks about these subjects, the teachings are true. The Bible is a God breathed book about God and His story of man's redemption. The Bible is a book that deals with the major factors of our lives, and can tell us far more about ourselves and ulitimate reality than mere human observations and data. Indeed the only thing that can 'help' people is the Bible. I am not excluding church, or prayer, or even the Holy Spirit; but we learn all about these things by digging into the Bible. Indeed we should be convinced of the fact that the Bible is profitable.
(Picture taken from Tyndale's Translation of the Bible)