The Blessed Buddha once said:
When a Bhikkhu develops the Ways to Force, that is enriched with concentrated Investigation,
constructed by effort, by thinking: In this way will my Investigation, neither be too slack, nor
too tense, it will neither be constricted internally, nor scattered externally, then he dwells
experiencing both what is in front, and what is behind, what is above, so also below, so by day,
so also by night! Therefore, with a mind all open and unrestricted, he develops the dazzling bright
mind, which is pervaded by its own internal luminosity... What is Investigation, that is too slack?
Investigation joined with sloppy carelessness is called Investigation, that is too slack!What is Investigation, that is too tense? Restless, hurried, agitated Investigation is called
an Investigation, that is too tense!What is Investigation, that is constricted internally? Investigation done in laziness.
This is Investigation that is constricted internally!What is Investigation, that is scattered externally? Investigation that in craving and urge is
directed towards the five sense pleasures. This is called Investigation that is scattered and
diverted externally!How does one dwell experiencing both the front and what is behind?
The perception of both the front and the back side of all phenomena, is well attended to, and
thereby well comprehended, well considered, and well known by understanding...
This is Investigation, that knows both what is in the front and back!How does one dwell seeing as below, so above; as above, so below?
One reviews this very frame of body upwards from the soles of the feet, and downwards from
the tips of the hairs, enclosed by skin, as full of many kinds of impurities: There are in this body:
Head-hairs, body-hairs, nails, teeth, skin, flesh, sinews, bones, bone-marrow, kidneys, heart, liver,
pleura, spleen, lungs, intestines, mesentery, vomit in the stomach, excrement, bile, lymph, pus, blood,
sweat, fat, tears, slime, spit, snot, joint fluid , and urine...This is Investigation, that knows what is
below, so also above; as above, so also below...How does one dwell as by day, so at night; as at night, so by day?
Here, at night a Bhikkhu trains the Steps to Force that is enriched with concentrated Investigation,
constructed by effort, using the same techniques, qualities, and aspects, as he trains during the day.
So does one abide as by day, so at night; as by night, so by day!And how, does one dwell with a mind that is all open and unrestricted, a dazzling bright mind, which is
pervaded by its own luminosity...?
Here, friends, the perception of day-light is well attended to and well resolved upon by determination.
It is in exactly this way, that one dwells with a mind, that is all open and unrestricted, a dazzling bright
mind, which is pervaded by its own luminosity...
Investigation=inquiry=scrutiny=analysis
Investigation is a Way to Suprahuman Force!
Source (edited extract):
The Grouped Sayings of the Buddha. Samyutta Nikāya. [V:278]
section 51: The 4 Forces: Thread 20: Analysis of the Ways.
Investigation is a Way to Force!