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111CHAPTER 22 Let us take time to think about it “PHYSICAL TIME IS VITAL to the formalized understanding of reality. It is however, just a concept of operationwithout a precise definition. We even ask ourselves if it exists as a con-ceptual state. Indeed, the past is gone, the future is not yet and as forthe present, it ceases to exist when it is ready to begin,” he stated. Inother words, Klein asked if anything can exist if it only exists of non-existence. “It only proves refuted,” Marcel Conche wrote. The problemis that if we cannot a priori imagine the existence of time, we cannotimagine its inexistence either, because every experience, human or oth-erwise, seems to follow this abstraction. This actually serves sciencebecause causality, the corollary of linear time, is the justification of itscontributions! Let us see if it is as solid as we think. We know that psychological time possesses a variable fluidity and that its consistency is quite relative. We have seen that psychologicaltime comes from within. In fact, it varies with age and is determinedby the intensity of events. Even temporal isolation experiments onindividuals have not been able to elucidate the matter. Therefore, ourreflex response is to focus on what is called “physical” time. Klein put it beautifully. “It seems impossible to derive the time of the world from the time of the soul.” Would the seeming aporiabetween the punctual instant (before/ after) and the living present(immediate past/immediate future) condemn us to incompatibility,i.e. to the principle of excluding a third possibility? Is the thickness oftime a chimera? Nothing is less certain! Time is energy in the broadestsense of the word and vice versa (personal conception). In fact, unsta-ble, ephemeral and intangible time is a nuisance to scientists, who