What are
the Effects of the 4 Ways to Spiritual Force?

The Blessed Buddha once said:
When a Bhikkhu develops The
4 Feet of Force
quite enriched with
concentrated desire,
concentrated energy, concentrated thought and
concentrated investigation
constructed
by effort thinking: In this
way will my desire, energy, thinking and investigating neither be
too
slack nor too tense, and it will neither be constricted internally nor
distracted externally,
then he dwells experiencing both what is in
front and what is behind, so above, so also below,
as by day, so also at
night! Thus, with a mind that is all open and unrestricted, he develops
this
unique and dazzling bright mind that is pervaded by it's own luminosity...
When the 4 feet of suprahuman force have been developed, refined
and cultivated in exactly
this way, then the Bhikkhu possesses the various
kinds of suprahuman force: having been one,
he becomes many; having
been many, he becomes one; he appears and he vanishes; he goes fully
unhindered through a wall, through a barricade, through a mountain
as if through empty space;
he dives in and out of the earth as if
it were water; seated cross-legged, he travels in space
like a bird, he walks on water without sinking as if it were solid
ground;
with his hand he touches
and strikes the moon and sun so powerful
and mighty; he masters the body and any form as far
as the fine-material Brahma world...

About
Abhiññā:
The
6 suprahuman forces, higher powers, or supernormal knowledge's see:
https://What-Buddha-Said.net/library/DPPN/wtb/a/abhinna.htm
More on the 4 Steps to Suprahuman Force!
https://What-Buddha-Said.net/library/DPPN/wtb/g_m/iddhi_paada.htm
https://What-Buddha-Said.net/drops/IV/Suprahuman_Force_I.htm
https://What-Buddha-Said.net/drops/IV/Suprahuman_Force_II.htm
https://What-Buddha-Said.net/drops/IV/Suprahuman_Force_III.htm
https://What-Buddha-Said.net/drops/IV/Suprahuman_Force_IV.htm
https://What-Buddha-Said.net/drops/IV/Suprahuman_Force_V.htm
https://What-Buddha-Said.net/drops/IV/Desire_as_Way_to_Force.htm
https://What-Buddha-Said.net/drops/IV/Energy_as_Way_to_Force.htm
https://What-Buddha-Said.net/drops/IV/Thinking_as_Way_to_Force.htm
https://What-Buddha-Said.net/drops/IV/Investigation_as_Way_to_Force.htm

Source (edited extract):
The Grouped Sayings of the Buddha.
Samyutta Nikāya. [V:265-66]
section 51: The 4 Forces: Thread 11: Shaking The Mansion.