It is a great temptation to go on multiplying the rules of the game. There are so many sensible and necessary pieces of advice which we all need to have emphasized. That is the course we must try to avoid. The child needs to be told, arbitrarily for a while, what is right, and what is wrong, that he must do this, and he must not do that. The time comes, however, when the growing instinct toward right living is the thing to foster--not the details of life which will inevitably take care of themselves if the underlying principle is made right. It must be the ideal of moral teaching to make clear and pure the source of action. Then the stream will be clear and pure. Such a stream will purify itself and neutralize the dangerous inflow along its banks. It is true that great harm may come from the polluted inflows, but they will be less and less harmful as the increasing current from the good source flows down. We shall have to look well to our habits lest serious ills befall, but that must never be the main concern or we shall find ourselves living very narrow and labored lives; we shall find that we are failing to observe one of the most important rules of the game. VI THE NERVOUS TEMPERAMENT Beyond the ugly actual, lo, on every side, Imagination's limitless domain. BROWNING. He that too much refines his delicacy will always endanger his quiet. SAMUEL JOHNSON. The great refinement of many poetical gentlemen has rendered them practically unfit for the jostling and ugliness of life. STEVENSON. It has been my fortune as a physician to deal much with the so-called nervous temperament. I have come both to fear and to love it. It is the essence of all that is bright, imaginative, and fine, but it is as unstable as water. Those who possess it must suffer--it is their lot to feel deeply, and very often to be misunderstood by their more practical friends. All their lives these people will shed tears of joy, and more tears of sorrow. I would like to write of their joy, of the perfect satisfaction, the true happiness that comes in creating new and beautiful things, of the deep pleasure they have in the appreciation of good work in others. But with the instinct of a dog trained for a certain kind of hunting I find myself turning to the misfortunes and the ills.