There is only one passion, the passion for happiness.
(Denis Diderot (1713-1784), French philosopher. repr. In Selected Writings, ed. Lester G. Crocker (1966). Elements of Physiology, "Will, Freedom," (notes written 1774-1780, originally published 1875-1877).)
... there is no human being who having both passions and thoughts does not think in consequence of his passions.
(George Eliot [Mary Ann (or Marian) Evans] (1819-1880), British novelist. Middlemarch, ch. 47 (1871-1872).)
Men are admitted into Heaven not because they have curbed & governed their passions or have no passions, but because they have cultivated their understandings. The treasures of Heaven are not negations of passion, but realities of intellect, from which all the passions emanate uncurbed in their eternal glory. The fool shall not enter into Heaven let him be ever so holy.
(William Blake (1757-1827), British poet, painter, engraver. repr. In Complete Writings, ed. Geoffrey Keynes (1957). A Vision of the Last Judgement (1810).)
What is the main thing in love? to know and to hide. To know about the one you love and to hide that you love. At times the hiding (shame) overpowers the knowing (passion). The passion for the hiddenthe passion for the revealed.
(Marina Tsvetaeva (1892-1941), Russian poet. repr. in A Captive Spirit: Selected Prose, ed. and trans. by J. Marin King (1980). The House at Old Pimen, ch. 2 (1934).
On her youthful love for a girl.)