‘If one is unable to conceive of the Christ mystery as a true reality, one also cannot develop any ideas and concepts relating to the rest of world existence that are imbued with reality, which really penetrate to the truth’. – Rudolf Steiner In a series of 17 lectures, Rudolf Steiner throws new light on the historical background and esoteric meaning of what he refers to as the central event of human and earthly history: the Christ mystery or ‘the Mystery of Golgotha’. Basing his commentaries on personal spiritual research, Steiner emphasizes the key nature of the Mystery of Golgotha, through which ‘...something was accomplished which has to do not with the moral order alone but with the whole world-order in its entirety’. This relates to a transformation of the spiritual environment of the earth and a potentially radical change in human consciousness. Building on the core themes of this course, Steiner presents a variety of fascinating topics, including: original sin and the idea of resurrection; faith and knowledge; the nature of sleep and the riddle of fatigue; the violation of the mysteries by the Roman Emperors; the teachings of Mani and Augustine; our relationship to the dead in spiritualistic séances; and the correspondence between the Platonic year, a day in a person’s life and a human life-time. Although first delivered to audiences a century ago, these lectures have lost none of their resonance; indeed, their essential message is perhaps more relevant than ever. They are published here in a new translation and for the first time in a complete English edition. ‘So let us endeavour to make spiritual science our own not merely as a teaching but as a language, and then wait until we find the questions in this language that we may address to Christ. He will answer, yes He will answer!’