Solo Scriptura
Virtually all of the sixteenth century antitrinitarians were biblicists. They lacked not a reverence for the text as the norm of doctrine but rather a traditionary norm for the regulation of their exegesis. They believed quite strongly that they had simply taken the next logical step beyond that of the Reformers: they accepted the Reformers’ attack in the name of sola Scriptura on the doctrinal accretions characteristic of medieval theology and turned the new, non-allegorical, textual, and literal exegesis on a wider array of traditional dogmas, most notably, the doctrine of Christ and the doctrine of the Trinity
Richard A. Muller, Post-Reformation Reformed Dogmatics: The Rise and Development of Reformed Orthodoxy; Volume 4: The Triunity of God (Grand Rapids, MI: Baker Academic, 2003), 79.