Secession implies a peaceful, legal, orderly process while rebellion is the exact opposite. Lincoln is obviously talking about rebellion since he adds the qualifier "...and having the power...". Why do you need power if your parting is by mutual consent?
“Secession implies a peaceful, legal, orderly process while rebellion is the exact opposite.”
That’s immaterial. The same right is invoked for both, only the mechanics of exercising the right are different. Similarly, whether I print a pamphlet, or phone my representatives, or stand out on the street corner with a megaphone, it’s all speech, just the mechanics differ.
“Lincoln is obviously talking about rebellion since he adds the qualifier “...and having the power...”. Why do you need power if your parting is by mutual consent?”
Obviously you don’t need power to have a right, only to exercise it successfully, and only in certain circumstances. If you needed power in order to claim a right, it wouldn’t be a right. Lincoln is speaking of practicalities, so don’t confuse them with limitations on the right itself.