Etienne Tempier declares the notion that time can exist only in the mind to be heretical. This idea was conceived by Saint Augustine, who wrote in the Confessions: “It is in my mind, then, that I measure time. I must not allow my mind to insist that time is something objective. When I measure time, I am measuring something in the present of my mind. Either this is time, or I do not know what it is.” Nevertheless, it seems to have some basis in modern physics: in the intimate detail of physics, the variable of time disappears, leaving only irreversible and non-commutative processes that give rise to the increase in entropy, which is relative to the observer (it measures the number of states that our blurred vision does not distinguish), and which generates our perception of (local) time.
