Gentlemen, the character of Washington is among the most cherished contemplations of my life. It is a fixed star in the firmament of great names, shining without twinkling or obscuration, with clear, steady, beneficent light.
— Daniel Webster

Thoughts give birth to a creative force that is neither elemental nor sidereal. Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow. When a man undertakes to create something, he establishes a new heaven.
Philipus A. Paracelsus firmament quote

And really, the reason we think of death in celestial terms is that the visible firmament, especially at night (above our blacked-out Paris with the gaunt arches of its Boulevard Exelmans and the ceaseless Alpine gurgle of desolate latrines), is the most adequate and ever-present symbol of that vast silent explosion.
— Vladimir Nabokov

How hard to realize that every camp of men or beast has this glorious starry firmament for a roof! In such places standing alone on the mountaintop it is easy to realize that whatever special nests we make---leaves and moss like the marmots and birds, or tents or piled stone---we all dwell in a house of one room---the world with a firmament for its roof---and are sailing the celestial spaces without leaving any track.
— John Muir

Rather than have it the principal thing in my son's mind, I would gladly have him think that the sun went round the earth, and that the stars were so many spangles set in the bright blue firmament.
— firmament quotation by Thomas Arnold