"The declaration was a nice document. Notice the part about all men being equal? Ending slavery was part of fulfilling that document. Therefore the south was blocking the fulfillment of the promises made in the declaration. It is ironic that secessionists want to claim the declaration, yet reject the issue of equality it contains. As we have been finding out, equality is one of the main principles of the American Revolution. We are still striving to fully realize that promise. The people that advocate secession whether it was in 1860 or today only claim the Declaration in an attempt to deny the principles of the American Revolution. It is a big paradox and one the big reasons why secession today will not occur again."
January 1, 1970
https://en.wikiquote.org/wiki/United_States_Declaration_of_Independence