That passionate solitude was the very soul of the genius and of the work of Michelangelo. He lived shut up in himself without any real connection with the art of his time. He despised Raphael because he said, "All his talent came from study and not from nature."[129] He himself declared that he derived all his inspiration from within, and if in his pride he underestimated what he was always studying with feverish and persistent ardour, yet it is true that he never sought in the study of the works of others a means of changing or of renewing his own personality, but only of still further emphasising it. In a way he sought from others not examples or lessons, but reasons for being still more himself. It is true that from the beginning to the end he fed on his own soul. Who knows the man, knows his work. The most striking thing about this extraordinarily unified nature is that it was composed of hostile worlds; a brutal materialism and serene idealism, an infatuation with pagan strength and beauty and a Christian mysticism; a mixture of physical violence and intellectual abstraction; a platonic soul in an athlete's body. That indissoluble union of opposing forces which undoubtedly caused part of his suffering was also the cause of his unique greatness. We feel that the supreme balance of his art is the result of a fierce struggle, and it is the sense of that struggle which gives to the work its heroic character. All is passion even to the abstract idea, so that idealism, which with many artists is a cause of coldness and death, is here a hearth burning with love and hate.[130] There is undoubtedly a danger in that mystic faith which loses itself in inward visions of such charm that they often leave a feeling of only disgust and contempt for reality. Non vider gli occhi mei cosa mortale * * * E se creata a Dio non fusse eguale Altro che 'l bel di fuor, ch'à gl'occhi piace, Più non vorria; ma perch'è si fallace, Tracende nella forma universale.[131] Varchi was quite right in recognising in Michelangelo the Socratic spirit.[132] Whether he gained these ideas from the teaching of the great Platonists with whom he had talked as a youth in the gardens of San Marco or whether that teaching had merely revealed to him his true nature there is certainly a close relationship between the theories on art of the school of Socrates and those of Michelangelo.