We have stumbled upon many unhappy circumstances in the hundred years that have gone by since the event that we are celebrating. Almost all of them have come from self-centered men, men who saw in their own interest the interest of the country, and who did not have vision enough to read it in wider terms, in the universal terms of equity and justice and the rights of mankind. I hear a great many people at Fourth of July celebrations laud the Declaration of Independence who in between Julys shiver at the plain language of our bills of rights. The Declaration of Independence was, indeed, the first audible breath of liberty, but the substance of liberty is written in such documents as the declaration of rights attached, for example, to the first constitution of Virginia, which was a model for the similar documents read elsewhere into our great fundamental charters. That document speaks in very plain terms. The men of that generation did not hesitate to say that every people has a right to choose its own forms of government--not once, but as often as it pleases--and to accommodate those forms of government to its existing interests and circumstances. Not only to establish but to alter is the fundamental principle of self-government. We are just as much under compulsion to study the particular circumstances of our own day as the gentlemen were who sat in this hall and set us precedents, not of what to do but of how to do it. Liberty inheres in the circumstances of the day. Human happiness consists in the life which human beings are leading at the time that they live. I can feed my memory as happily upon the circumstances of the revolutionary and constitutional period as you can, but I cannot feed all my purposes with them in Washington now. Every day problems arise which wear some new phase and aspect, and I must fall back, if I would serve my conscience, upon those things which are fundamental rather than upon those things which are superficial, and ask myself this question, How are you going to assist in some small part to give the American people and, by example, the peoples of the world more liberty, more happiness, more substantial prosperity; and how are you going to make that prosperity a common heritage instead of a selfish possession? I came here to-day partly in order to feed my own spirit. I did not come in compliment. When I was asked to come I knew immediately upon the utterance of the invitation that I had to come, that to be absent would be as if I refused to drink once more at the original fountains of inspiration for our own Government.