As history has demonstrated many times over, change may arrive slowly or quickly but it is the one constant, in one form or another, on which we can all count.
What do we call the river? Every moment the water is changing, the shore is changing, every moment the environment is changing, what is the river then? It is the name of this series of changes.
Repeal the Missouri Compromise - repeal all compromises - repeal the Declaration of Independence - repeal all past history, you still can not repeal human nature. It still will be the abundance of man's heart, that slavery extension is wrong; and out of the abundance of his heart, his mouth will continue to speak.
For some natures, changing their opinions is just as much a requirement of cleanliness as changing their clothes: for others, however, it is merely a requirement of vanity.