“If I am I because you are you, and you are you because I am I, then I am not I and you are not you. But if I am because I am I, and you are you because you are you, then I am I and you are you”

Rabbi Menachem Mendel of Kotzk

“Once upon a time I dreamed I was a butterfly, fluttering hither and thither, to all intents and purposes a butterfly. I was conscious only of following my fancies as a butterfly, and was unconscious of my individuality as a man. Suddenly I woke, and there I lay, myself again. Now I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly dreaming I am a man”

Chuang-Tse – 3rd Century BC