The validity and authority of  Scriptures is often called into question, mostly by those who believe there is no God.

In an age where skepticism prevails, Pentecostals affirm the Bible as the divinely inspired and inerrant Word of God. Scriptures is the result of God moving upon holy men to carefully record His revelation of truth to all humanity (2 Timothy 3:16, 17 ; Matthew 5:18; 2 Peter 1:20, 21; John 5:39), a source the Church has always considered final and authoritative for doctrine.

Besides this critical claim as the source of infallible truth, there are two other alternative stances taken by others toward the Bible: (1) absolute error and (2) a composite of both truth and error. The first alternative is clearly understood and rejected by Pentecostals, though the second poses a more complex problem. Liberal scholars often point to contrived inconsistencies and contradictions in the Bible; however, if only discreet parts are accepted as true, then the whole must be judged as ultimately unreliable.

Further, it is argued, if the divinely infallible Christ is related to fallible Scripture, how can an errant word of God reveal an inerrant Christ who is believed to be the incarnate Word? Such logic is contradictory and inconsistent with the foundation necessary for strong Christian faith. Therefore, Pentecostals categorically reject all perspectives of Scripture opposing that of absolute inerrancy and divine inspiration.

In addressing this issue, Pentecostals offer further logic as notable evidence for this stand. First, it is of inconsistent character for a trustworthy God who desires reconciliation with lost humanity to offer a flawed revelation of the divine plan. Second, the power of life-transformation attests to the truth of the Bible; the lives of countless millions have been miraculously changed by the word of God.

Finally, that a pervasive unity and harmony exist in Scripture, despite the diversity of authors and centuries separating them, lends strong support to the Bible as the infallible word of God.

Though a majority of mainline protestant denominations reject the Bible as accurate and divinely inspired, Pentecostals hold steadfast to that claim and faithfully depend upon its truth as the foundation for their beliefs and practice.

http://kevinnunez.org/2011/11/20/authority-god-governs-his-people-through-scripture/