But here, even in this World, are Joys which our Ideas of Heaven can scarce exceed, and if Imperfection appear thus lovely, what must Perfection be, and what may we not expect and hope for, by a meritorious Acquiescence in Providence, under the Direction, Indulgence, and Protection of infinite Wisdom and Goodness, who manifestly designs perfect Felicity, as the Reward of Virtue in all his Creatures, and will at proper Periods answer all our Wishes in some predestined World. All this the vast apparent Provision in the starry Mansions, seem to promise: What ought we then not to do, to preserve our natural Birthright to it and to merit such Inheritance, which alas we think created all to gratify alone, a Race of vain-glorious gigantick Beings, while they are confined to this World, chained like so many Atoms to a Grain of Sand. _I am_, &c. * * * * * Transcriber Note Spelling conventions used in the book were retained. On page 5, there is an unattached footnote. As it refers to The Pendulum Clock and Huygens wrote a book whose title includes these words, the assumption was made that the footnote belongs after his name. On page 30, the missing anchor for the footnote about Parallax was placed before the term in paragraph three. The same situation occurs on page 54 where a footnote about Motion had no anchor and was linked to the term in the last paragraph. On page 72, there is a measurement "11 Feet ¾" to which "Inches" was added. Plate XXIII was mislabeled as Plate XXI. This was corrected.