How should we cultivate the heart, the feeling? There is no doubt that harmlessness, devotion, and kindness are necessary; but there is something besides these. It is the awakening of certain centers which make one sensitive, not only externally but also mentally. There are two kinds of people: one will be struck by the beauty of music or other manifestations of beauty; another is as dull as a stone to all this. Why? Because something in his heart and mind is not awakened. We have five senses, but we also have inner senses, and these can enjoy life much more keenly. Some people will say that they need no inner senses, that the outer senses satisfy them completely. They would speak differently if, for instance, they lost their eyesight or another of their five senses. In order to be complete a human being must also develop his inner senses; but first of all he should develop his inner feeling.