Shikantaza as non-seperation

"Shikantaza is generally rendered in English as Just Sitting. And how we tend to interpret that is that we sit without expectation of gain or achievement".

"This translation of Just Sitting is unfortunately terse and a problem which we often come accross in translating terms from Chinese or Japanese, because the primary meaning of Just Sitting is not Sitting without an expectation of gain. The primary meaning of Just Sitting is non-separation. In other words, when there is sitting, there isn't a self and a world. There is simply "this". And hence, the self and the world disappear into this Just Sitting".

https://www.youtube.com/watch?v=vEjVNAkW72I