Philo Judaeus De Ebrietate 51

And we may almost say that this has happened to many of those who have used out of the way roads to learning; for still, as one may say, men coming from their very swaddling clothes to the most perfect study and way of life, philosophy, not thinking it fit to be utterly ignorant of encyclical learning, have still determined to apply themselves to them late and unwillingly. And then, descending from the older and more important kinds of learning to the contemplation of the inferior and younger branches, they have grown old among them so as no longer to be able to return to those pursuits with which they began.