“Everything tends to make us believe that there exists a certain point of the mind at which life and death, the real and the imagined, past and future, the communicable and the incommunicable, high and low, cease to be perceived as contradictions.”

Source: 1970s, Toward a General Social Science, 1974, p. vii as cited by Debora Hammond (1995) "Perspectives from the Boulding files". In: Systems Research Vol. 12 No. 4, p. 281-290

Source: "Some Perplexities about time: with an attempted solution" (1925), p. 149. as cited in: Jonathan Gorman, "The transmission of our understanding of historical time." Historia Social y de la Educación 1.2 (2012): 129-152.

Variant translation: When the past no longer illuminates the future, the spirit walks in darkness.
Book Four, Chapter VIII
Democracy in America, Volume II (1840), Book Four

Source: Seriously... I'm Kidding

Source: Heart of Darkness

Source: Common risk factors in the returns on stocks and bonds, 1993, p. 8

Beyond the Veil
Context: Life passes, but the conditions of life do not. Air, food, water, the moral sense, the mathematical problem and its solution. These things wait upon one generation much as they did upon its predecessor. What, too, is this wonderful residuum which refuses to disappear when the very features of time seem to succumb to the law of change, and we recognize our world no more? Whence comes this system in which man walks as in an artificial frame, every weight and lever of which must correspond with the outlines of an eternal pattern?
Our spiritual life appears to include three terms in one. They are ever with us, this Past which does not pass, this Future which never arrives. They are part and parcel of this conscious existence which we call Present. While Past and Future have each their seasons of predominance, both are contained in the moment which is gone while we say, "It is here."
So the Eternal is with us, whether we will or not, and the idea of God is inseparable from the persuasion of immortality; the Being which, perfect in itself, can neither grow nor decline, nor indeed undergo any change whatever. The great Static of the universe, the rationale of the steadfast faith of believing souls, the sense of beauty which justifies our high enjoyments, the sense of proportion which upholds all that we can think about ourselves and our world, the sense of permanence which makes the child in very truth parent to the man, able to solve the deepest riddle, the profoundest problem in all that is. Let us then willingly take the Eternal with us in our flight among the suns and stars.
Experience is our great teacher, and on this point it is wholly wanting. No one on the farther side of the great Divide has been able to inform those on the hither side of what lies beyond.

1936 speeches to the Great Council of Chiefs