Thomas Taylor - Fragments that Remain of the Lost Writings of Proclus - Argument the Fifth lyrics

Argument the Fifth. If time subsist together with heaven [i.e. with the universe], and neither * can the universe exist if time is not, nor time if the universe has no existence; and if time was not, when the universe was not, neither will time be when the universe does not exist. For if the universe was when time was not, it then follows that time was when time was not. For that which once was is said to have existed once, in consequence of at a certain time not having existed; since it is neither that which eternally exists, nor that which never exists, but is the medium between both. But wherever there is the once, there time exists. And if the universe will be when time will not have an existence, thus pa**ing from existing at a certain time to not existing at a certain time, * in this case, time will then be when there will be no time [because time and the universe are consubsistent]: for the term ποτε (or, at a certain time) is temporal. If, therefore, the universe neither was when time was not, neither will it be when time ceases to exist. For a subsistence at a certain time (ποτε) which pertains to both these, time not existing, will yet be temporal. Time therefore always is. For to a subsistence at a certain time, either the always is opposed, or the never. But it is impossible that the never should be opposed to it; for, in short, time has an existence. Hence, time is perpetual. But heaven [or the universe] is consubsistent with time, and time with heaven. For time is the measure of the motion of heaven, just as eternity is of the life of animal itself; * which thing itself spews that time is perpetual. For if this be not admitted, either eternity will be the paradigm of nothing, time not existing, though eternity exists, or neither will eternity itself possess the power of always remaining that which it is; † in consequence of the paradigm of either pa**ing from non-existence into existence, or into non-existence from existence. The heaven therefore always ‡ is, in the same manner as time, proceeding into existence together with time, and being generated neither prior nor posterior to time; but, as Plato says, it was generated, and is, and will be, through the whole of time.