Cyrus Ingerson Scofield was an American theologian, minister and writer. He was born in Lenawee County, Michigan, but during the American Civil War he served for a year as a private in the 7th Tennessee Infantry, C.S.A.. By 1866 he was in St. Louis, Missouri working in his brother-in-law's law office. Admitted to the Kansas bar in 1869, he was elected to the Kansas legislature as a Republican in 1871 and 1872 and was appointed U.S. attorney for the district of Kansas.

Plain Papers on the Holy Spirit is a message of meditation based on the Bible and written After his conversion to evangelical Christianity in 1879, Scofield assisted in the St. Louis campaign conducted by Dwight L. Moody and served as the secretary of the St. Louis YMCA. Significantly, Scofield came under the mentorship of James H. Brookes, pastor of Walnut Street Presbyterian Church, St. Louis, a prominent dispensationalist premillennialist.

Scofield's correspondence Bible study course was the basis for his Reference Bible, an annotated, and widely circulated, study Bible first published in 1909 by Oxford University Press. Scofield's notes teach dispensationalism, a theology that was in part conceived in the early nineteenth century by the Anglo-Irish John Nelson Darby, who like Scofield had also been trained as a lawyer.

Scofield died at his home in Douglaston, Long Island, in 1921.