This reflection on the life and work of Zwier Willem (Wim) Leene paints a picture of the sparkle and fiery inspiration in the early days of contemporary Rosicrucianism, the time of the pioneers Z. W. Leene, Jan Leene (later known as Jan van Rijckenborgh) and Cor Damme. The Fiery Fervour of Emergence may be regarded as an overture to Called by the World Heart, a history of the Spiritual School of the Golden Rosycross. An overture touches on all the themes that appear in a piece of music, and so this book illuminates all the themes of soul development with words and thoughts charged with fiery energy and with the simplicity of expression with which Z. W. Leene connected his listeners to their own spiritual potential. Themes that could unfold extensively in later years in the Spiritual School and are now accessible to all as a sevenfold development towards a new and higher consciousness in the field of the Mystery School of the Rosycross. 'Aspiration' and 'friendship' are two words that characterize the life and work of Z. W. Leene, concepts that he propagated in an absolute self-forgetfulness serving a consciously experienced mission. Aspiration is what the individual brings. In everything, however, friendship appears to be the key word for spiritual connection. Friendship for one another but also a friendly benevolence for all who approach the great work of the sevenfold world brotherhood. This is the account of the fire, the spiritual connection and the united friendship between Z. W. Leene, Jan Leene and Cor Damme through which the world of Light could bestow a new mandate, a new dawn of the Brotherhood of the Rosycross, as a new birth to society.