Friends:

 

    What is the Equanimity Link to Awakening?

Even evaluation is characteristic of the Equanimity Link to Awakening.
(Upekkhā-Sambojjhanga). Preventing both deficiency & excess and
securing impartiality is the function of Equanimity. Imperturbable
ballance is the manifestation of the Equanimity Link to Awakening.
Equanimity just looks on whenever new phenomena arises and ceases.
This stable yet plastic patience purifies all the other advantageous
mental states, which reach maximum, when joined with Equanimity...

Equanimity (Upekkhā) is a moderating mental construction.
Equanimity is also a mood of neither gladness nor sadness.
Equanimity is also a feeling of neither pain nor pleasure.
Equanimity is also the neutral ability to be indifferent.
Equanimity is also the 4th infinitely divine dwelling.
Equanimity is also a quite high form of happiness.
Equanimity is also a refined mental purification.
Equanimity is therefore a Link to Enlightenment...

There is Equanimity both regarding live beings and dead things.
There is Equanimity both regarding all internal & external states.
There is Equanimity both regarding all past, present and future.
There is Equanimity both regarding all mentality & all materiality.

The Buddha once said: What mental fermentations (āsava) should be
overcome by development? If a Bhikkhu by alert & rational attention
develops the Equanimity Link to Awakening based on seclusion, based
on disillusion, on ceasing, culminating in full renouncing relinquishment,
then neither can mental fermentation, nor any fever, nor discontent
ever arise in him. MN2 [i 11]

When mind is concentrated one can observe all closely in equanimity.
The Equanimity Link to Awakening arises right there. He develops it,
and for him repeatedly meditating it goes gradually to the completion
of its development. MN118 [iii 85]

Further inspirations on the imperturbable quality of Equanimity:
http://What-Buddha-Said.net/drops/III/Feeding_Equanimity.htm
http://What-Buddha-Said.net/drops/Even_is_Equanimity.htm