what to the slave is the fourth of july?

This is a talk delivered by Frederick Douglass on July 5, 1852.

To check out the whole speech read the above link, but here is an exerpt (which is oddly modern for being over 150 years old):

Allow me to say, in conclusion, notwithstanding the dark picture I have this day presented of the state of the nation, I do not despair of this country. There are forces in operation, which must inevitably work The downfall of slavery. "The arm of the Lord is not shortened," and the doom of slavery is certain. I, therefore, leave off where I began, with hope. While drawing encouragement from the Declaration of Independence, the great principles it contains, and the genius of American Institutions, my spirit is also cheered by the obvious tendencies of the age. Nations do not now stand in the same relation to each other that they did ages ago. No nation can now shut itself up from the surrounding world, and trot round in the same old path of its fathers without interference. The time was when such could be done. Long established customs of hurtful character could formerly fence themselves in, and do their evil work with social impunity. Knowledge was then confined and enjoyed by the privileged few, and the multitude walked on in mental darkness. But a change has now come over the affairs of mankind. Walled cities and empires have become unfashionable. The arm of commerce has borne away the gates of the strong city. Intelligence is penetrating the darkest corners of the globe. It makes its pathway over and under the sea, as well as on the earth. Wind, steam, and lightning are its chartered agents. Oceans no longer divide, but link nations together. From Boston to London is now a holiday excursion. Space is comparatively annihilated. Thoughts expressed on one side of the Atlantic are, distinctly heard on the other. The far off and almost fabulous Pacific rolls in grandeur at our feet. The Celestial Empire, the mystery of ages, is being solved. The fiat of the Almighty, "Let there be Light," has not yet spent its force. No abuse, no outrage whether in taste, sport or avarice, can now hide itself from the all-pervading light. The iron shoe, and crippled foot of China must be seen, in contrast with nature. Africa must rise and put on her yet unwoven garment. "Ethiopia shall stretch out her hand unto God."