The time and durations, 
instant, 
timelessness and eternity

It is not because the states of the universe are born and die, that the nature (the essence, source) of the durations (of the time), has had a beginning and will have an end.

Although time is measurable and represented by symbols, it is not a physical reality; all thinkers admit it.
Expressed differently, without reality there is not duration, time is thus, a "potentiality" ( a virtuality) without dimension.

Nevertheless, as the perceptions (as the sense), durations are associated to the reality.
But then, what can we say about the nature of the durations, these intervals which are not space ?,
what can we say about the lapses of time which enable integrating the evolutions in rigorous chronologies ?

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"The Lorentz transformations for time and the space coordinates are valid for the passage of an inertia system to another. All the contents of the restricted relativity is into this postulate : the nature's laws are invariant if we consider the Lorentz transformations …
… the present moment loses for the world which extends himself in the space its objective meaning.
From there comes that we have to conceive objectively the space and the time as a continuum of four indissoluble dimensions if we want to express the contents of the objective relations without superfluous, arbitrary and conventional processes. (cf. Einstein – Relativity, the special and general theory).

In other words, the knowledge (the formalization) of events that constitute a phenomenon, depends on choice of the inertia system, besides :

"According to the interpretation of the probabilities, at least in its current state, the time has a particular utility ; it breaks the relativist symmetry of the four variables of the space and when we introduce it in theory of Dirac, we introduce at the same time this absence of symmetry.
In other words, as long as we look at the Dirac's theory as an analytical expression without physical sense, we can consider it corresponds with relativity, but as soon as we want verifiable forecasts experimentally, it is necessary to use wave functions to define the possible values of the characteristics observable phenomena and their respective probability, and for that, the time plays has a particular utility, …
… we can say that this difficulty seems be connected with underlying causes such as the existence of a sense privileged for the time and the persistency of the physical units in the time …" (cf. L. de Broglie –Inert matter and Light – 1937).

These remarkable points of view show that before a research of the primordial causes, we have to meditate on the time.

For example, if the time is considered as a mysterious entity that flows,
or as a group of intervals (of durations) which are not of the space and therefore, which are of transcendent order,
the universe can appear,
or as having had a beginning,
or, as we believe it, eternal.

Another important facts,
- space contains the reality according three axis which we distinguish a priori, three privileged directions that enable specifying the dimensions ; and, all beings recognize, in their own way, what we call the length, the width and the height,
- the temporal references are recognized by means of faculties which enable to every being, more exactly, by means of faculties which enable to the creative entity who animates the beings, of using the durations, these intervals which are not space,
and it, with of the innate processes, or of the innate and conscious processes for the man,
- besides, space and time contain no discontinuity, nevertheless, we "divide" them to evolve us in the space.

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