The writer of Hebrews says, “Long ago, at many times and in many ways, God spoke to our fathers by the prophets” (1:1). The prophets were ancient word-warriors who spoke with divine authority, uttering, “Thus, saith the Lord!”
The apostle Peter describes the prophets as having been “carried along by the Holy Spirit,” like a ship driven by a tempestuous wind (2 Peter 1:21; Acts 27:15-17).
The Old Testament prophets were both forth-tellers and foretellers. Their divine messages applied directly to the times in which they lived, but they also gave glimpses into the future known as prophecies, something that requires divine inspiration (2 Timothy 3:16). Isaiah, the granddaddy of the Major Prophets, contains much Bible prophecy, including, for example, one we recite at Christmas about the birth of our Savior (9:6-7).