When the eyes open, darkness does not negotiate its departure — it simply vanishes. Krishna tells Arjuna: once you gain this knowledge, delusion will never trouble you again. You will see every living being — without exception — first within yourself and then in Me. Separation will dissolve.
This is not an abstract philosophical claim. It is a description of a lived experience: the moment a person truly understands the unity of all existence, the old habit of seeing 'me versus them' falls away. Compassion arises naturally because the other is recognized as oneself.