This is a line delivered during No.53 from Delbert Grady to Jack.
It’s layered, here we go.
In No.24, Jack confesses to Wendy that he’s had a sense of deja vu, which is pushed with the continuation “You’ve always been the caretaker” but it’s also a case of:
False fatalism: Grady is no longer the caretaker because he's dead. He's "always been here" meaning he's a ghost trapped in the hotel.
True fatalism: Grady is an aspect of Jack's psyche, asserting to Jack that Grady is of service to HIM and that Jack is completely in control. "I've always been here" means the aspects of Grady/that Grady represents have always been present within Jack and now he's finally 'facing' or owning them.
Once Grady affirms his authority with Jack/within Jack, he switches his personality sharply. Jack calls him Jeevesy but once we’re in the bathroom, Grady is in control.
In this image · No.53