According to Osho, after the fourth stage there is no question—what is needed continues, what isn’t drops by itself. But don’t seek that promise now; such questioning is the mind’s trick to avoid the necessary first three stages, which dissolve fear and repression. Do them totally, allowing happenings (with deep breathing); then spontaneity decides, not you.
Do the first three stages wholeheartedly; after the fourth, they’ll naturally continue or fall away—don’t try to skip ahead.