know something of it, but in our evolutionary time nothing of that kind is possible. Each thing is an epitome of the whole. Have you been training your eye to see a world in a grain of sand? Can you look through your specialty out upon the total universe and say: "I am a specialist merely because I do not want to be a narrow man. My specialty is my telescope. Everything belongs to me. I cannot, it is true, turn to it all at once. Being a feeble person I must advance from point to point, accepting limitations; but just as fast as I can, having mastered those limitations, I shall cast them aside and press on into ever broader regions." But I said specialization was fundamentally justified through the organization of society, because by its division of toil we contribute our share to the total of human knowledge; and yet the popular objector declares that we are presumptuous, and because we have mastered our own specialty we are apt to assume ourselves capable of pronouncing judgment over the whole field. Undoubtedly there is this danger; but such a result is not inevitable. The danger is one which we are perfectly capable of setting aside. The temper of our mind decides the matter, and this is entirely within our control. What is the use of our going forth presumptuous persons? We certainly shall be unserviceable if we are persons of that type. That is not the type of Charles Darwin in biology, of William James in psychology, of Horace Howard Furness in Shakespeare criticism, of Albert Michelson in physics. These are men as remarkable for modesty and simplicity as for scholarly insight. The true characteristic of a learned specialist is humility. What we want to be training ourselves in is respect for other people and a sense of solidarity with them. Our work would be of little use if there were not somebody at our side who cared nothing for that work of ours and cared immensely for his own. It is our business to respect that other man, whether he respects us or not. We must learn to look upon every specialist as a fellow worker. Without him we cannot be perfect. Let us make ourselves as large as possible, in order that we may contribute our little something to that to which all others are contributing. It is this coöperative spirit which it should be ours to acquire. And it seems to me that you are under peculiarly fortunate circumstances for acquiring it. What strikes me as fatal is to have a group of young specialists taken and trained by themselves, detachedly, shut off from others. Nothing of that sort occurs here. Every day you are rubbing shoulders with persons who have other interests than yours. When you walk to dinner, you fall in with a comrade who has been spending his day over something widely unlike that which has concerned you. Possibly you have been able to lead him to talk about it; possibly you have gained an insight into what he was seeking, and seen how his work largely supplements your own.