were working on the basis of anthroposophical ideas. Etymology and earlier uses of the word Anthroposophy is an amalgam of the Greek terms ( 'human') and ( 'wisdom'). An early English usage is recorded by Nathan Bailey (1742) as meaning "the knowledge of the nature of man." The first known use of the term anthroposophy occurs within Arbatel de magia veterum, summum sapientiae studium, a book published anonymously in 1575 and attributed to Heinrich Cornelius Agrippa. The work describes anthroposophy (as well as theosophy) variously as an understanding of goodness, nature, or human affairs. In 1648, the Welsh philosopher Thomas Vaughan published his Anthroposophia Theomagica, or a discourse of the nature of man and his state after death. The term began to appear with some frequency in philosophical works of the mid- and late-nineteenth century. In the early part of that century, Ignaz Troxler used the term anthroposophy to refer to philosophy deepened to self-knowledge, which he suggested allows deeper knowledge of nature as well. He spoke of human nature as a mystical unity of God and world. Immanuel Hermann Fichte used the term anthroposophy to refer to "rigorous human self-knowledge," achievable through thorough comprehension of the human spirit and of the working of God in this spirit, in his 1856 work Anthropology: The Study of the Human Soul. In 1872, the philosopher of religion Gideon Spicker used the term anthroposophy to refer to self-knowledge that would unite God and world: "the true study of the human being is the human being, and philosophy's highest aim is self-knowledge, or Anthroposophy." In 1882, the philosopher Robert Zimmermann published the treatise, "An Outline of Anthroposophy: Proposal for a System of Idealism on a Realistic Basis," proposing that idealistic philosophy should employ logical thinking to extend empirical experience. Steiner attended lectures by Zimmermann at the University of Vienna in the early 1880s, thus at the time of this book's publication. In the early 1900s, Steiner began using the term anthroposophy (i.e. human wisdom) as an alternative to the term theosophy (i.e. divine wisdom). Central ideas Spiritual knowledge and freedom Anthroposophical proponents aim to extend the clarity of the scientific method to phenomena of human soul-life and spiritual experiences. Steiner believed this required developing new faculties of objective spiritual perception, which he maintained was still possible for contemporary humans. The steps of this process of inner development he identified as consciously achieved imagination, inspiration,