What did Seventh-day Adventists actually believe before creeds and revision cycles reshaped their theology? The 1889 Fundamental Principles offer a direct answer — the original 28 points of the SDA pioneers, published in the official church Yearbook throughout Ellen G. White’s ministry. From the nature of God and Christ’s priestly work in the heavenly sanctuary, to the Sabbath, the state of the dead, and the millennium — these principles were explicitly defended by Ellen G. White herself. This document presents the 1889 text alongside her direct statements, original footnotes, and a timeline tracing how — and when — they were set aside.