Sant Tukaram says:

 

Once in water, salt cannot return to solid form.Likewise, the one who has understood reality is dissolved.Thought has become thoughtless.The Saint stays in Brahman.He never goes again into the illusion. Like the bee, only interested in honey from the flower,he is always thinking of the Self.Inside and outside,only Self.

** Please keep in mind that's what Tukaram says. It doesn't have to be that way at all. for some entities a few seconds can be enough, for a few several hours, maybe as many as a few days etc. We are all (as I see it)) on different stages on our personal journeys...