What is Whitsun, or Pentecost, and how can its impulse be furthered for the future of society? How can social life become the bearer of the Christ impulse, and how can Christ himself enter social life directly? In this small booklet, Sergei Prokofieff discusses the significance of spiritual work conducted in a social setting and its crucial role in preparing for the future epoch of the spirit-self. The spiritual and social tasks before us, he tells us, can be achieved only "through mutual efforts with one another." Moreover, for such social activity, the General Anthroposophical Society, "with all of its different groups and branches, which unite all anthroposophists in the world," plays a fundamental role. Thus, the spiritual tasks of the General Anthroposophical Society gradually unite with the tasks of all humankind. This booklet, consisting of the report of a lecture and supplemented with an essay, is an important companion to another publication by this author, The Esoteric Significance of Spiritual Work in Anthroposophical Groups.