"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."
January 1, 1970
https://en.wikiquote.org/wiki/What_to_the_Slave_Is_the_Fourth_of_July%3F