The Union is much older than the Constitution. It was formed in fact, by the Articles of Association in 1774. It was matured and continued by the Declaration of Independence in 1776.
In those days, our Declaration of Independence was held sacred by all, and thought to include all; but now, to aid in the making the bondage of the negro universal and eternal, it is assailed, and sneered at, and construed, and hawked at, and torn, till, if its framers could rise from their graves, they could not at all recognize it.
How can one be compelled to accept slavery? I simply refuse to do the master's bidding. He may torture me, break my bones to atoms and even kill me. He will then have my dead body, not my obedience. Ultimately, therefore, it is I who am the victor and not he, for he has failed in getting me to do what he wanted done.