The first one

p.72 of the Survey:

"It is not when we merely do a thing, but when we do it for the first time, that the most formidable obstacles are encountered. We therefore honour the Master not only as an Arhant, or one by whom, having qualified himself for the superhumanily difficult task by practicing the Ten Perfections for an incalculable number of lives, without a teacher and without a guide breaks through the obstacle that block the road to Nirvana and throws it open once more to the traffic of humanity."

(italics in the original, not mine)