In "The Last Jedi", Yoda appears to Luke as a Force spirit as he debates whether to burn down the tree storing the Sacred Texts of the Jedi. As Luke makes his way to the tree, Yoda appears behind him and reminds him that a Jedi must always be sure of his path. When Luke decides to burn down the tree, Yoda summons a lightning bolt and sets it ablaze. When confronting Yoda as to why he did it, Yoda assures Luke that the books contained no knowledge that Rey didn't already possess. He stressed that true Jedi knowledge was not found in books but within Jedi themselves--and it is their responsibility to pass that knowledge on, reminding him, "The greatest teacher, failure is." As Luke takes in the message, he shares a quiet moment with his former master, who informs that the burden of all masters is being surpassed by their students.