19. John says the "testimony of Jesus" is the "spirit of prophecy." Revelation 19:10.
John, the author of Revelation, was imprisoned on Patmos because he had the spirit of prophecy—("the testimony of Jesus"). (See Revelation 1:9.)
Seventh-day Adventists believe that a fulfillment of the gift of prophecy in the last-day church is evidenced in the ministry and writing of a woman named Ellen G. White. The visions and dreams she received and recorded from 1844 until she died in 1915 pass all the Biblical tests: a Christ-centered message, accuracy in their predictions, and her life and teachings harmonize with the character and doctrine of Jesus.
Although she had the equivalent of only three years of formal education, God strengthened her to overcome a tragic accident in her youth and enabled her to write some 100,000 pages of manuscript on a wide variety of subjects. These include, but are not limited to, history, medicine, health, education, finance, family relationships, counseling, church organization, and the work of ministers.
As a result of her counsel, hospitals, publishing houses, universities and industries have been successfully established all over the world for the purpose of advancing the gospel of Jesus. Specialists in their fields have examined her writing and testify of her expertise. They acknowledge that, not only did she give counsel which was far advanced for her day, but the test of time has proven that she was always accurate in sifting through the maze of misguided thinking prevalent throughout her generation.