What is Whitsun, 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 directly into social life? In this small booklet Prokofieff speaks of 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-social tasks set before us, he says, \'...can only be achieved through mutual efforts with one another.\' And 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, concludes Prokofieff, \'...the spiritual tasks of the General Anthroposophical Society are gradually combined with the tasks of all mankind.\' This booklet, consisting of a report of a lecture supplemented with an essay, is an important companion to the publication by the same author, The Esoteric Significance of Spiritual Work in Anthroposophical Groups.