"The Spirit of God as Fire; the Globe Within the Sun Our Heaven" by D. Mortimore is a philosophical treatise written in the late 19th century. This work delves into metaphysical concepts surrounding the nature of God, the cosmos, and the afterlife, drawing heavily on Biblical scripture and recent astronomical discoveries. The author claims to uncover a new understanding of heaven and the divine based on both religious revelation and scientific insight. The opening of the text encompasses a broad introduction to Mortimore's sweeping thesis, asserting that the truths he presents may initially face skepticism but are rooted in a divine revelation that transcends criticism over time. He likens his discoveries to historical figures like Galileo, who faced opposition during their groundbreaking quests for knowledge. Mortimore lays the groundwork for exploring diverse themes related to the afterlife, the essence of the immortal soul, and the relationship between divinity and the observable universe, indicating that the forthcoming chapters will deepen the reader's understanding of these profound subjects. (This is an automatically generated summary.)