Buddhist-Meditation-Systematic-and-Practical

gets the mind to the ninth stage of samatha (see last
chapter) and then begins the samapatti of impurity.
The samatha of samatha is when one has attained good
concentration—the latter is the ordinary name only.
Third, samapatti of samapatti. The latter is samapatti
itself such as thinking upon the truth of impurity. The
former is some method of samapatti used as a cure, such
as right mindfulness or right recognition, to correct the
true samapatti when it goes astray.
Last is samatha of samapatti. The former is the firm
concentration attained during the exercise of the
samapatti, the latter is samapatti itself.
If, during this meditation, your mind strays and does not
tend to remain concentrated on the subject of impurity,
then the medicine for this is right recognition, so that
the samatha may be quickly recovered. If the mind still
continues to concentrate on the subject but not so
strongly, and develops drowsiness, then with right
recognition raise up the mind.
The meditation on impurity is always accompanied by
the perception of pain and impermanence (duhkha and
anitya) and it is therefore easy to become sleepy. Any
samapatti upon a subject arousing feelings of dislike
will tend to throw up this obstacle. We should consider:
Today is quickly passing and no one knows when death
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