Translation is, for the scholar, a troubling art; it is literary history gone gambling. It was until very recently the basis of all Chinese reading, and a literate adolescent could read all but the earliest works in this tradition with little difficulty, if not always with perfect accuracy. (Stephen Owen, An Anthology of Chinese Literature)
What is the subject of the sentence in bold?
I need native speakers' help.
The grammatical subject is "it", referring to translation.
I am not a teacher.