Friends:

 

    What is Feeding the Equanimity Link to Awakening!

The Blessed Buddha once said:
Bhikkhus, just as this body, is sustained by feeding, exists in dependence on feeding
and cannot survive without food, even & exactly so are the Seven Links to Awakening
also sustained by feeding, they can also only exist in dependence on feeding and they
cannot remain without feeding... And what, bhikkhus, is the feeding of the emergence
of any yet unarisen Equanimity Link to Awakening and also feeding of the completion
by condensation of any arisen Equanimity Link to Awakening? There are states that
are the basis and source for the Equanimity Link to Awakening!! Frequently directing
careful and rational attention to them, is feeding the emergence of unarisen Equanimity
Link to Awakening & also feeding of the gradual fulfilment of any arisen Equanimity
Link to Awakening... And what, Bhikkhus, is the starving that obstructs all emergence of
a yet unarisen Equanimity Link to Awakening & which also hinders any already arisen
Equanimity Link from reaching complete fulfilment by meditative development?
There are states that are the basis and source for the Equanimity Link to Awakening!!
Not giving frequent, careful and rational attention to them; not considering them much
and often; is the starving that prevents an unarisen Equanimity Link to Awakening from
arising and also blocks any already arisen Equanimity Link to Awakening from reaching
any complete fulfilment through mental training in the form of frequent meditation...

Comments from the classical commentaries:
Imperturbable onlooking ballance is characteristic of the Equanimity Link to Awakening.
(Upekkhā-Sambojjhanga). Moderation, seeking the neutral middle, & composed control is
the purpose of the quality of Equanimity (Upekkhā). Imperturbability is the manifestation
of the Equanimity Link to Awakening. This stable yet plastic patience purifies all the other
advantageous mental states, which thus reach their maximum, when joined with Equanimity...

Further conditions helpful for the emergence of the Equanimity Link to Awakening are:

1: Impartiality regarding all living & sentient beings...
2: Indifference regarding all inanimate constructions...
3: Avoiding biased people who prefer favouritism & one-sided partiality...
4: Friendship with well ballanced people unmoved by both pleasure & pain...
5: Commitment to ballance the mind into even & imperturbable Equanimity!

There is Equanimity towards living beings and there is Equanimity regarding material things!
There is Equanimity towards internal states & there is Equanimity regarding external states!
There is Equanimity towards all past, present, and future times, events, and phenomena!
There is Equanimity towards all mentality and there is Equanimity regarding all materiality!

Sources (edited extracts):
The Grouped Sayings of the Buddha. Samyutta Nikāya.
Book [V: 65-6+102-8] 46: Links. 2+51: Group & Nutriments....