Anti-Schizophrenia "When Descartes wished to assure himself of the truth of knowledge, he said : Cogito ergo sum; that is, he ceased to look at the cogitatum which is abstract thought and looked at the cogitare itself, the act of the ego, the centre from which all rays of our world issue and to which they return. And then he no longer found in thought the being which is only a simple idea, a universal to be realized.." Giovanni Gentile, The theory of Mind as pure Act, ch. 8