The quote "The world is a round trip ship, and that this trip has no return" from Arturo Pérez-Reverte's book "The Spherical Letter" conveys a profound observation about life's journey. It suggests that life is akin to a voyage aboard a ship that moves in a circular path, yet ultimately, there is no way to return to where one started. The implication is that experiences shape us, and while we may revisit places or memories, we can never truly go back to our former selves or circumstances.