Inner
Tranquillity
is a
Mental Power:
In what sense is calm a power? In the 1st
jhāna
this mental calm does not
waver even when attacked by the
5
mental hindrances, thus is calm a power!
In the 2nd
jhāna this serenity does not flicker by any thoughts or thinking,
thus is calm a power... In the subtle mental sphere of neither perception, nor
non-perception, this tranquil composure does not hesitate,
even when facing
void empty nothingness, thus is calm a power! Such silenced imperturbability
can neither waver, nor vacillate, nor hesitate in any
unstable indecisiveness
despite being provoked by agitation,
confusion, distraction, and perturbation,
therefore is calmness a power. Such is the power of calm: The calm power!
Visuddhimagga 703

More on this
Serene Calm
(Samatha)
=Tranquil Ease:
Forest Bliss,
Calm,
Calm_and_Insight,
The_Tranquil_One,
Breathing_Calm_and_Insight,
Silenced,
Forest_Bliss2