The "kingdom of heaven" is a condition of the heartnot something that comes "above the earth" or "after death."
(Friedrich Nietzsche (1844-1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 6, p. 207, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). The Antichrist, section 34 (prepared for publication 1888, published 1895).)
I begin to see that a man's got to be in his own heaven to be happy.
(Mark Twain [Samuel Langhorne Clemens] (1835-1910), U.S. author. 1907. Eli Stormfield, in "Extracts from Capt. Stormfield's Visit to Heaven," p. 835, Mark Twain: Collected Tales, Sketches, Speeches, & Essays, 1891-1910, Library of America (1992).)
'Twas not by ideas,by heaven! his life was put in jeopardy by words.
(Laurence Sterne (1713-1768), British author, clergyman. The Life and Opinions of Tristram Shandy, Gentleman (1760), vol. 2, ch. 2, eds. Melvyn New and Joan New, University of Florida Press (1978).
Said about uncle Toby's efforts to master the jargon of fortifications.)