“Past, n. That part of Eternity with some small fraction of which we have a slight and regrettable acquaintance. A moving line called the Present parts it from an imaginary period known as the Future. These two grand divisions of Eternity, of which the one is continually effacing the other, are entirely unlike. The one is dark with sorrow and disappointment, the other bright with prosperity and joy. The Past is the region of sobs, the Future is the realm of song. In the one crouches Memory, clad in sackcloth and ashes, mumbling penitential prayer; in the sunshine of the other Hope flies with a free wing, beckoning to temples of success and bowers of ease. Yet the Past is the Future of yesterday, the Future is the Past of to-morrow. They are one--the knowledge and the dream.”

"Heroic Reason", as translated by H. R. Hays, in Selected Writings of Juan Ramon Jimenez (1957) edited by Eugenio Florit, p. 231.
Context: A permanent state of transition is man's most noble condition. When we say an artist is in a state of transition, many believe that we are belittling. In my opinion when people speak of an art of transition this indicates a better art and the best that art can give. Transition is a complete present which unites the past and the future in a momentary progressive ecstasy, a progressive eternity, a true eternity of eternities, eternal moments. Progressive ecstasy is above all dynamic; movement is what sustains life and true death is nothing but lack of movement, be the corpse upright or supine. Without movement life is annihilated, within and without, for lack of dynamic cohesion. But the dynamism should be principally of the spirit, of the idea, it should be a moral dynamic ecstasy, dynamic in relation to progress, ecstatic in relation to permanence.

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.

Source: Shantaram

To Jacques Mercanton, on the structure of Ulysses, as quoted in James Joyce: The Critical Heritage (1997) by Robert H. Deming, p. 22

The Devil's Dictionary (1911)

Source: Initiation, Human and Solar (1922), p. 13

Source: Walden

Jerilderie Letter (1879)

Variants: One of the schools in Tlön has reached the point of denying time. It reasons that the present is undefined, that the future has no other reality than as present hope, that past is no more than present memory . . . Another maintains that the universe is comparable to those code systems in which not all the symbols have meaning, and in which only that which happens every three hundredth night is true...
The history of the universe... is the handwriting produced by a minor god in order to communicate with a demon.
Tlön, Uqbar, Orbis Tertius (1940)
Context: One of the schools of Tlön goes so far as to negate time; it reasons that the present is indefinite, that the future has no reality other than as a present hope, that the past has no reality other than as a present memory. Another school declares that all time has already transpired and that our life is only the crepuscular and no doubt falsified an mutilated memory or reflection of an irrecoverable process. Another, that the history of the universe — and in it our lives and the most tenuous detail of our lives — is the scripture produced by a subordinate god in order to communicate with a demon. Another, that the universe is comparable to those cryptographs in which not all the symbols are valid and that only what happens every three hundred nights is true. Another, that while we sleep here, we are awake elsewhere and that in this way every man is two men.