(11) The following statement from a modern text book may serve to point to the difference between the conception of Pure Duration, and Time: "Pure Duration is conceived without regard to the motions of changes in things. Time on the contrary is the sensible measure of any portion of duration, often marked by particular phenomena, as the apparent revolution of the celestial bodies, the rotation of the earth on its axis, etc. Our conception of Time originates in that of motions; and particularly in those regular and equable motions carried on in the heavens, the parts of which, from their perfect similarity to each other, are correct measures of the continuous and successive quantity called Time, with which they are conceived to co-exist. Time, therefore, may be defined as, The perceived number of successive movements. Time, based upon the movements of the celestial bodies, or the earth, is frequently measured by instruments based upon such movements, such as watches, clocks, sun-dials, etc." We are also conscious of the passage of Time by changes in our mental states, our thoughts, our mental images, etc., both in the waking state or the state of dreams. Without changes in the outside world, represented to our consciousness by perceptions of such changes, or without changes in our mental states, Time would not exist for us. It thus follows that given an Eternal Changeless Reality, for whom and by whom no "outside world" has been or is manifested; and which is wrapped in an unconscious and dreamless sleep, such as is pictured in the First Aphorism; for such a Reality there could exist no Time—no Time would present itself—Timelessness would abide, until Change began once more.

(10) The First Aphorism further states: "Time there was not: for Change had not begun." Here, again, is expressed another "hard saying" for the student who has not grasped the true meaning of "Time." Time, in the strict philosophical meaning of the term, does not mean pure duration of existence —instead, it means "the measure of changing existence." An enduring existence in which there is no change of form, activity, or degree, mental or physical, is Timeless. Time, in fact, is but the "measure of Change." Without Change there can be no Time, in the true sense of the latter term. Pure Being manifests not Time. Time is the result of Becoming, or Change, and is always measured by change or becoming in something.

(11) It also states: "Time begins." This is seen to be true because Change has begun, and Change is the essence of Time, and Time the measure of Change.

(4) And for this cause, just as Eternity transcends the bounds of Time; so Time [itself], in that it cannot have bounds set to it by number, or by change, or by the period of the revolution of some second [kind of Time],—is of the nature of Eternity. Both, then, seem boundless, both eternal. And so stability, though naturally fixed, yet seeing that it can sustain the things that are in motion,—because of all the good it does by reason of its firmness, deservedly doth hold the chiefest place. XXXII

(57) Timaeus: our subsequent argument will be greatly hampered. The facts about them have already been stated in part; but in addition thereto we must state further that motion never consents to exist within uniformity. For it is difficult, or rather impossible, for that which is to be moved to exist without that which is to move, or that which is to move without that which is to be moved; but in the absence of these there is no motion, and that these should ever be uniform is a thing impossible. Accordingly, we must always place rest in uniformity,

(2) And so, although Eternity is stable, motionless, and fixed, still, seeing that the movement of [this] Time (which is subject to motion) is ever being recalled into Eternity,—and for that reason Time’s mobility is circular,—it comes to pass that the Eternity itself, although in its own self, is motionless, [yet] on account of Time, in which it is—(and it is in it),—it seems to be in movement as all motion. So that it comes to pass, that both Eternity’s stability becometh moved, and Time’s mobility becometh stable. So may we ever hold that God Himself is moved into Himself by [ever-] same transcendency of motion. For that stability is in His vastness motion motionless; for by His vastness is [His] law exempt from change.

(38) Timaeus: that what is become is become, and what is becoming is becoming, and what is about to become is about to become, and what is non-existent is< non-existent; but none of these expressions is accurate. But the present is not, perhaps, a fitting occasion for an exact discussion of these matters. Time, then, came into existence along with the Heaven, to the end that having been generated together they might also be dissolved together, if ever a dissolution of them should take place; and it was made after the pattern of the Eternal Nature, to the end that it might be as like thereto as possible; for whereas the pattern is existent through all eternity,

(39) Timaeus: that the “wanderings“ of these bodies, which are hard to calculate and of wondrous complexity, constitute Time. Nevertheless, it is still quite possible to perceive that the complete number of Time fulfils the Complete Year when all the eight circuits, with their relative speeds, finish together and come to a head, when measured by the revolution of the Same and Similarly-moving. In this wise and for these reasons were generated all those stars which turn themselves about as they travel through Heaven, to the end that this Universe might be as similar as possible to the perfect and intelligible Living Creature in respect of its imitation of the Eternal

(37) Timaeus: For simultaneously with the construction of the Heaven He contrived the production of days and nights and months and years, which existed not before the Heaven came into being. And these are all portions of Time; even as “Was” and “Shall be” are generated forms of Time, although we apply them wrongly, without noticing, to Eternal Being. For we say that it “is” or “was” or “will be,” whereas, in truth of speech, “is” alone

(58) Timaeus: and motion in non-uniformity; and the cause of the non-uniform nature lies in inequality. Now we have explained the origin of inequality ; but we have not declared how it is that these bodies are not separated according to their several Kinds, and cease not from their motion and passage one through another. Wherefore, we shall once more expound the matter as follows. The revolution of the All, since it comprehends the Kinds, compresses them all, seeing that it is circular and tends naturally to come together to itself ; and thus it suffers no void place to be left.