Your first duty to God, to yourself, and to the world is to make yourself as great a personality, in every way, as you possibly can. And that, it seems to me, disposes of the question of duty. There are one or two other things that might be disposed of in closing this chapter. I have written of opportunity in a preceding chapter. I have said, in a general way, that it is within the power of every man to become great, just as in "The Science of Getting Rich I declared that it is within the power of every man to become rich. But these sweeping generalizations need qualifying. There are men who have such materialistic minds that they are absolutely incapable of comprehending the philosophy set forth in these books. There is a great mass of men and women who have lived and worked until they are practically incapable of thought along these lines; and they cannot receive the message. Something may be done for them by demonstration, that is, by living the life before them. But that is the only way they can be aroused. The world needs demonstration more than it needs teaching. For this mass of people our duty is to become as great in personality as possible in order that they may see and desire to do likewise. It is our duty to make ourselves great for their sakes; so that we may help prepare the world that the next generation shall have better conditions for thought.