Philo Judaeus De Aeternitate Mundi 53

[53] And it is the most absurd of all ideas to fancy that there ever was a time when the world did not exist, for its nature is without any beginning and without any end, since these very expressions, "there was," "when," "formerly," all indicate time; and keeping to this view, then, according to the theory of the conflagration ...... ¹ he at a late period of his life entertained doubts and withheld any positive opinion; for it does not belong to youth, but to old age, to see clearly things of solemn importance which it is desirable to understand, and especially as to matters which it is not the outer sense, which is irrational and deceitful, that determines, but the pure and unalloyed intellect. For that which has no existence is not put in motion, but it has been shown already that time is an interval of the motion of the world. It follows, therefore, of necessity, that each of these things must have subsisted from all eternity, without receiving any beginning of generation, and being in consequence not liable to any corruption.