30 Not to be born is then by far the best, according to Solomon's sentence. For they also who have seemed to themselves to excel most in philosophy have followed him. For he, before these philosophers in time, but later than many of our writers, spoke thus in Ecclesiastes: “And I praised all the departed, which are already dead, more than the living, who are yet alive. And better than both they is he who has not yet been born, and who has not seen this evil work which has been done under the sun. And I saw all travail, and all the good of this labour, that for this a man is envied of his neighbour. And, indeed, this is vanity and vexation of spirit.”
Source: On the Death of Satyrus (New Advent)