Above all, you must understand that no prophecy of Scripture came about by the prophet's own interpretation. For prophecy never had its origin in the will of man, but men spoke from God as they were carried along by the Holy Spirit. 2 Peter 1:20-21
Okay, time for some theology. Put today's passage under the heading "Inspiration of Scripture." Paul's words in 2 Timothy 3:16 and Peter's words here serve as proof texts verifying God as the Author of the Bible using the pen and personalities of men.
The writing of Scripture, Peter explains, did not come about by men sitting down to write whatever they pleased. God worked through each author to deliver His intended message. The words "carried along" are used by Luke to describe a sailing vessel moved with the wind (Acts 27:15,17). All Scripture is "God-breathed" as the writers were "carried along" by the Holy Spirit.
J.I. Packer says it well: "All [the Bible's] manifold contents--histories, prophecies, poems, songs, wisdom, writings, sermons, statistics, letters, and whatever else--should be received as from God, and all that the Bible writers teach should be revered as God's authoritative instruction. Christians should be grateful to God for the gift of His written Word, and conscientious in basing their faith and life entirely and exclusively upon it. Otherwise, we cannot ever honor or please Him as He calls us to do" (Concise Theology, 5).
Father, we are grateful for the gift of Your written Word. May we never take this gift for granted. Help us to be hearers and doers of every truth. In Jesus' name. Amen.