There are different name for it from different cultures or philosophies.
In Daoism it is called the absolute or the undifferentiated one or Wuji.
In Zen it is called satori or kensho.
In Yoga or Buddhism its called samadhi.
In Sufism it is called fana and the Quaker call it inner light.
So many names to describe the same phenomenon.
But all these names describe the same state of mind.
I prefer the undifferentiated one. It is for me the description who shows clear in the state of highest consciousness there is no movement, differentiation, no two or three. If you are able to be in that state of mind you are with God, Buddha, Allah or the One. Or better said you are in that moment the named ones. With the experience of the highest consciousness your mind will change. From now on you know we are not separated and we all have the same roots even it get called differently in different cultures.