Ecclesiastes 1:9

Let no one listening to these words think that much talk and the repetition of words is vanity by the distinction between what is and what had been, for they demonstrate the difference between body and soul. Although the meaning of terms does not differ that much, the text does make a distinction to clearly manifest the difference for you. The soul existed right from the beginning; it had been purified in the past and will appear in the future. God fashioned the human body and will show the resurrection at the proper time, for that which comes after the resurrection was indeed fashioned first. The resurrection is nothing other than the restoration [apokatastasis.] of all things to their original state.

Let none of those listening think that there is a longwinded and meaningless repetition of words in the distinction between what has come to be and what has been made. The text points out in each of the expressions the difference between the soul and the flesh. The soul has come to be, and the body has been made. It is not because the words have two different meanings that the text uses this distinction of terminology for each of the things referred to. But [it does so] to enable you to reckon what is advantageous in each case. The soul came to be in the beginning the same as it will again appear hereafter, when it has been purified. The body shaped by the hands of God was made what the resurrection of the dead in due time will reveal it to be. For such as you may see it after the resurrection of the dead, just such it was made at the first. The resurrection of the dead is nothing but the complete restoration of the original state.

We say that not then for the first time did God begin to work when he made this visible world; but as, after its destruction, there will be another world, so also we believe that others existed before the present came into being. And both of these positions will be confirmed by the authority of Holy Scripture. For that there will be another world after this is taught by Isaiah, who says, "There will be new heavens, and a new earth, which I shall make to abide in my sight, says the Lord." And that before this world others also existed is shown by Ecclesiastes, in the words "What is that which has been? Even that which shall be. And what is that which has been created? Even this which is to be created: and there is nothing altogether new under the sun. Who shall speak and declare, Lo, this is new? It has already been in the ages which have been before us." By these testimonies it is established both that there were ages before our own and that there will be others after it. It is not, however, to be supposed that several worlds existed at once but that, after the end of this present world, others will take their beginning.