You may wonder if Yoda disappeared after dying, why didn't Vader after dying in this 1983 film
If 
you end your training now - if you choose the quick and easy path as Vader did 
.... [after Anakin is assigned by the Jedi to spy on Chancellor Palpatine] ... Star 
Wars: Episode VI - Return of the Jedi (1983) ... Luke: Master Yoda, you can't die.