'equanimity, equipoise, mental
balance' (lit., 'remaining here and there in the middle'), is the name for a
high ethical quality belonging to the sankhāra-kkhandha (s. khandha)
and is mostly known by the name upekkhā.
In its widest sense it is
associated with all pure consciousness (s. Tab. II).
is called the 'keeping in the middle of all things'.
It has as characteristic
that it affects the balance of consciousness and mental factors; as nature
(function; rasa), that it prevents excessiveness and deficiency, or that
it puts an end to partiality; as manifestation, that it keeps the proper
middle" (Vis.M. XIV). (App.).