In the course of a conversation with Sri Bhagavan, I once had occasion to say that having spent a lifetime in contact with Him, having imbibed His teachings as given in numerous conversations and discussions with others, and having also studied the works of Sri Bhagavan, I felt I could in a word summarise His teachings. On being graciously ordered to do so, I said that all His teachings amounted to this — that He alone IS, and everything else only seems to be but really is not.
Sri Bhagavan smiled and, saying, “Yes, yes, yes!” left it there. I quoted from His teachings: “The fourth state (turiya) alone is; the appearances of the three states are naught.”