There are only two forces that can carry light to all the corners of the globe ... the sun in the heavens and the Associated Press down here.
(Mark Twain [Samuel Langhorne Clemens] (1835-1910), U.S. author. Speech, September 18, 1906, to Associated Press, New York City. "Spelling and Pictures," Mark Twain's Speeches, ed. Albert Bigelow Paine (1923).)
That the sun will not rise to-morrow is no less intelligible a proposition, and implies no more contradiction, than the affirmation, that it will rise.
(David Hume (1711-1776), Scottish philosopher. Enquiries Concerning the Human Understanding and Concerning the Principles of Morals, sect. 4 ("Sceptical Doubts Concerning the Operations of the Understanding"), part 1, p. 25, ed. L. Selby-Bigge, M.A., London, Oxford University Press (1902).
From "An Enquiry Concerning Human Understanding.")
Look not into the sun! Even the moon is too bright for your nocturnal eyes!
(Friedrich Nietzsche (1844-1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 10, p. 196, selection 5, number 81, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). Unpublished fragments dating to November 1882February 1883.
Originally meant to be attributed to Zarathustra in Thus Spoke Zarathustra.)
Intuition, like the rays of the sun, acts only in an inflexibly straight line; it can guess right only on condition of never diverting its gaze; the freaks of chance disturb it.
(Honoré De Balzac (1799-1850), French novelist. Narrator, in A Bachelor's Establishment, originally named Les Célibataires, first part was published as Les Deux Frères in La Presse (1841); included in the Comédie humaine first under the title Un Ménage de Garìon and finally as La Rabo.)