In order to answer this question, we need to understand the difference between revelation and inspiration. Revelation is the communication of divine truth to man by God; inspiration is the recording of this communication in a reliable way.

During the writing of the Bible, the Holy Spirit exerted a supernatural influence on the writers, ensuring that what they wrote was accurate and reliable. 

2 Peter 1:21 (NKJV)

for prophecy never came by the will of man, but holy men of God spoke as they were moved by the Holy Spirit.

Paul also affirmed this concept to Timothy by stating that the scriptures were literally “God-breathed”;

2 Timothy 3:16 (NKJV)

All scripture is given by inspiration of God (or God-breathed), and is profitable for doctrine, for reproof, for correction, for instruction in righteousness,

As Peter understood it (2 Peter 1:21), prophecies of scripture are not the result of human initiative or human will, but are the result of the Holy Spirit working supernaturally through holy men of God.

Inspiration does not mean that God dictated His messages word for word to those who wrote the Bible. Rather, the Holy Spirit conveyed God’s exact words through human writers by guiding their thoughts, desires, and language, ensuring that what they wrote was precisely what God intended.

In the same way that a ship is guided to its destination by the wind, the Holy Spirit moved the human authors of Scripture to accurately convey God’s message.

By combining His sovereign will with the writers’ unique styles, vocabularies, and experiences, the Spirit of God filled the minds, souls, and hearts of the Bible writers, guiding them to produce a perfect and inerrant text.

The phrase “breathed out by God” is an important expression of divine inspiration, meaning that God is the source and ultimate author of scripture. 

Though written by human authors, the scriptures have the full weight of His authority; the Bible is God’s inerrant word from start to finish.

Most importantly, the Greek term “theopneustos,” translated as “breathed out by God,” refers to all of scripture and not just portions of it. In other words, the totality of the canon of scripture, down to the individual words themselves, was given by God and, therefore, is entirely true.

We also learn from scripture (2 Peter 1:20–21) that when the Holy Spirit of God used men to write the Word of God, He did not erase their natural characteristics but, in His Providence, prepared the writers for the task of developing the Scriptures. Each writer maintained their own distinctive style and vocabulary, as they wrote out of their special set of circumstances that were guided by the Spirit to bring about the miracle of the scripture.

Sometimes God told the Bible writers the exact words to say (e.g., Jer. 1:9), but more often, He used their minds, vocabulary, and experiences to produce His own perfect, infallible, inerrant Word (1 Thess. 2:13; Heb. 1:1; 2 Pet. 1:20, 21). 

In conclusion, God’s perfect and complete revelation of the Bible reveals the glorious character of its author. Because He is a God of truth, His Word is infallible. Because He cannot lie, His Word is inerrant. Because He is the King of kings, His Word is absolute and supreme.

Scriptures speak with His authority, and certainly there can be no more reliable source of truth.