There is the case where a monk is a Arahant whose effluents have ended, who has attained completion, finished the task, laid down the burden, attained the true goal, destroyed the bonds of becoming, and is released through right gnosis. All that is sensed by him, being unrelished, will grow cold right here. This is termed the Unbinding property with no fuel remaining. They, the Such. And there he should, at the appropriate times, see clearly into skillful mental qualities.
Wakefulness is better than sleep.
For those who are wakeful, there's no danger, no fear. So be devoted to wakefulness. When the Dhamma is being taught for the sake of the cessation of becoming, their minds do not take to it, are not calmed by it, do not settle on it or become resolved on it. This is how some adhere. This is how some slip right past.