When a man has reached his thirtieth year he has still a great deal to learn. That is obvious. But henceforward what he learns will principally be an amplification of his basic ideas; it will be fitted in with them organically so as to fill up the framework of the fundamental WELTANSCHAUUNG which he already possesses. What he learns anew will not imply the abandonment of principles already held, but rather a deeper knowledge of those principles. And thus his colleagues will never have the discomforting feeling that they have been hitherto falsely led by him. On the contrary, their confidence is increased when they perceive that their leader's qualities are steadily developing along the lines of an organic growth which results from the constant assimilation of new ideas; so that the followers look upon this process as signifying an