To approach the stranger is to invite the unexpected, release a new force, let the genie out of the bottle. It is to start a new train of events that is beyond your control.
T. S. EliotThe Rum Turn Tugger is a terrible bore: When you let him in, then he wants to be out; He's always on the wrong side of every door, And as soon as he's at home, then he'd like to get about.
T. S. Eliot