The Spirit of prophecy is the gift by which the prophets spoke in old time. “The prophets,” says Peter, “inquired and searched diligently” to know “what, or what manner of time the Spirit of Christ which was in them did signify, when it testified beforehand the sufferings of Christ, and the glory that should follow.” 1 Peter 1:10, 11. SPIAM 20.1
The Spirit of Christ “testified” through the prophets. It was the “testimony of Jesus” through the prophets to the church of old. It is the “Spirit of prophecy” which Christ gave as a gift to the New Testament church—“some, apostles; and some, prophets.” And here it is set forth in the vision of Revelation 12 as a gift restored to the remnant church. The advent movement was to be brought out, organized, and led of God into a special world-wide work. SPIAM 20.2