omnipercipience

Perception of everything.

[T]erreſtrial, celeſtiall, and ſuperceleſtiall, not onely all theſe Omnipercipiencies but any one of them is a certain Excellency in God, and, for ought we know, incommunicated to any Creature. […] [T]his Omnipreſence or Omnipercipience terreſtriall is one main ground of that religious Worſhip due to God which we call Invocation.

In the carving outside, a pair of eyes overlooks a kind of fence, a symbol of the omnipercipience and omnipresence of God.

The ability to fully understand the perspective and feelings over everybody.

The ideal observer theory maintains that the statemetn "X is right" means that X would be approved by an ideal moral judge who had the following characteristics: omniscience (knowledge of all relevant facts), omnipercipience (the ability to vividly imagine the feelings and circumstances of the parties involved, that is, something like empathy) , disinterestedness ( nonbiasedness), and dispassionateness ( freedom from disturbing passion).

Now it is not clear if Firth's characterization of omnipercipience includes empathy; that is, the ability to identify with other sentient beings and feel their pain, terror, pleasure, and so on. But whatever his intentions, let us understand omnipercipience to include perfect and unlimited powers of empathy.