Heraclitus river step quote
Greek flux and fire philosopher Heraclitus (c.475) on how change is the only eternal, as epitomized by his famous statement that "no man ever steps in the same river twice" for "its not the same and he's not the same" (see: turnover rate; Gibbs existence state)
In terminology, change, from the Latin cambire “to exchange, barter”, from PIE root kemb- “to bend, crook”, means to make different in some particular; transform; to give a different position, course, or direction. [1]

In 1824, Sadi Carnot, in his Reflections on the Motive Power of Fire, using a caloric theory of heat mindset, stated that NO change occurs in the condition of the working body in one heat cycle:

“Whenever work is done by heat (on a body in a cycle) no permanent change occurs in the condition of the working body [and that to deny this] would overthrow the whole theory of heat, of which it is the foundation.”

In 1856, Rudolf Clausius, fixed on the above errors in Carnot's "no change" statement, determined the measure of irreversible "change" in the universe, according to his Clausius inequality, specifically the value N called the equivalence value of all uncompensated transformations, thereby overthrowing the "whole theory of heat", replacing it with the new science of thermodynamics.

The following are related quotes:

“Nothing is permanent except change.”
Heraclitus (c.475BC), Fragments (Ѻ)

“It is in changing that we finding purpose.”
Heraclitus (c.475BC), Fragments (Ѻ)

Crebillon … treats the passions like playing cards, that one can shuffle, play, reshuffle, and play again, without their changing at all. There is no trace of the delicate, chemical affinity, through which they attract and repel each other, reunite, neutralize [each other], separate again and recover.”
Johann Goethe (1799), comment to Friedrich Schiller on the lack of realism in the work of Prosper Crebillon, Oct 23 [2]

See also
Free energy change
Gibbs free energy change
Negative free energy change
Turnover rate
Volume change

1. (a) Merriam-Webster Collegiate Dictionary, 2000.
(b) Change –
2. (a) Winnett, Susan. (1993). Terrible Sociability: the Text of Manners in Laclos, Goethe, and James (pg. 220). Stanford University Press.
(b) Lynch, Sandra. (2005). Philosophy and Friendship (Crebillon, pg. 37). Edinburgh University Press.
(c) Steer, Alfred G. (1990). Goethe’s Elective Affinities: the Robe of Nessus (Crebillon, pg. 37; symbolically, pg. 158). Winter.

External links
Change (disambiguation) – Wikipedia.

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