I don't remember anywhere saying that specifically; I interpreted things as if he only went to the quarry because it was the only work he could find. It was out of necessity, as a stop gap until he could establish himself as an architect. The fact that Rand choose a menial job, and the way she described the hardship of the labor, I see no reason to interpret it as meaning that he liked the work. I'm not a Rand scholar though and open to being convinced of the opposite. So yes, he went to the quarry out of refusal to sacrifice his values, but that doesn't support the position that he didn't suffer. Actually it's exactly what I said in my previous comment.
Besides, my point was that there are several sorts of 'sacrifice' and 'suffering'. The kind that Rand criticized is altruistic suffering - suffering to take the load from someone else. She has no qualms with 'suffering' in a physical sense or even in the sense of prolonged delay of self-realization or gratification if that is required to remain true to one's moral values.
Roark had job options working for other architects; the quarry was not the only work he could find. This was explicit in the book. I don't recall anything about Roark finding the quarry upsetting (i.e. it causing him suffering). If he was suffering -- which I think he wasn't, he was too strong -- it was because of the world in general, and the badness of the architects and clients he'd left behind, not due to the quarry which was nothing compared to them.
Do you think the people in Galt's Gulch suffered in their education? As I recall, they did things like voluntarily attend Galt's lectures (and pay for it, I think). No suffering in sight...
Besides, my point was that there are several sorts of 'sacrifice' and 'suffering'. The kind that Rand criticized is altruistic suffering - suffering to take the load from someone else. She has no qualms with 'suffering' in a physical sense or even in the sense of prolonged delay of self-realization or gratification if that is required to remain true to one's moral values.