Interestingly enough, he said this to Congress on January 12, 1848.
“... Any people anywhere, being inclined and having the power, have the right to rise up and shake off the existing government, and form a new one that suits them better. This is a most valuable, a most sacred right—a right which, we hope and believe, is to liberate the world...”
Like the Founders before him Lincoln believed in the natural right to rise up in rebellion against a tyrannical government. That wasn’t the situation in 1860.