"Nor have I ascended into heaven, nor have I seen all the works and creations of God, but heaven has revealed itself within the spirit in such a way that I there recognize the divine works and creations. By my own powers I am as blind as the next man, but through the spirit of God, my own inborn spirit pierces all things..." - Jacob Boehme
Jakob Böhme (probably April 24, 1575[1] – November 17, 1624) was a German Christian mystic and theologian. He is considered an original thinker within the Lutheran tradition, and his first book, commonly known as Aurora, caused a great scandal. In contemporary English, his name may be spelled Jacob Boehme; in seventeenth-century England it was also spelled Behmen, approximating the contemporary English pronunciation of the German Böhme.
Berdyaev's introductory essay (which I don't think was written for this volume) is pretty dreadful, but Boehme's writings were fascinating. Whoever selected these short texts chose ones which make the influence on Schelling's 1809 Freedom Essay extremely clear.