"Bhikkhus, these eight things, developed and cultivated, if unarisen do not
arise apart from the appearance of a Tathagata, an Arahant, a Perfectly
Enlightened One. What eight? Right view ... right concentration. These
eight things ..." [ BB, CD, p.1533, SN 45.14]
My very controversial interpretation.
The arising of the path is stream-entry. The noble eightfold path is the stream.
The path only arises on the appearance of a Tathagata. This means that the awakened
mind must appear first. Then the process of transformation can begin. It takes, on
average, about two weeks.
The stream-enterer is said to be destined for awakening. He does not have to do
anything, it is all automatic. The process completes itself. In fact, it cannot
be stopped or prevented. So, everything is already decided in the moment of the
opening of the Dhamma Eye.