San Agustín de Hipona and the time.
San Agustín treats on the time in Book XI of his work: "The Confessions". It will treat it after treating the eternity. It will begin the study on the essence of the time, to be able to respond to the raise of the skeptics of the nonexistence of the time. (The past it is no longer, the future is not yet and the present is too brief).
Agustín first will give three postulates on the essence of the time. First: it will say that the time is the one who tends to noone, because if always outside would be eternity. Second: that his primate is in the present. But that this is too brief, he does not have extension and therefore he is not measurable Third: that the past and the future, they do not exist like subjects, but like adjectives of the things. The things always are present in the soul. The things of the past as image treads; the things of the future as image sign and the present like project. The project tends to the future with the purpose of reaching the image sign. As it tends to that image, it goes towards the future, but simultaneously it is itself turning past. The movement that this generates is a movement of the Soul. It is a distension of the soul that takes place from the present which it projects towards the future which therefore it becomes last. This distension of the soul is a Aporia. Since the soul is spiritual and therefore it lacks extension. But its lack of extension of which it prevails to the soul is of a material movement. One would say that the agustiniana distension of the time is spiritual distension, that takes place from the functions spirituals (memory I project imagination). The movement of the soul is a temporary relation: from the present, the project.