The experiencer has to go.
The one who experiences samadhi, the one who experiences higher states of consciousness, has to go, has to be transcended, eliminated.
Therefore, as you practice "Who am I?"
whatever comes to you, you merely observe.
You realize back in your heart, that the observer has to go.
As long as there's somebody there to experience anything, you have not arrived anywhere.
So you continue to practice,
"Who am I?"
and you keep still.