The right of revolution is an ...

The right of revolution is an inherent one. When people are oppressed by their government, it is a natural right they enjoy to relieve themselves of oppression, if they are strong enough, whether by withdrawal from it, or by overthrowing it and substituting a government more acceptable.
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 Ulysses S. Grant

Quotes from the same author

Our great modern Republic. May those who seek the blessings of its institutions and the protection of its flag remember the obligations they impose.
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 Ulysses S. Grant
The natural disposition of most people is to clothe a commander of a large army whom they do not know, with almost superhuman abilities. A large part of the National army, for instance, and most of the press of the country, clothed General Lee with just such qualities, but I had known him personally, and knew that he was mortal; and it was just as well that I felt this.
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 Ulysses S. Grant
...I never heard him abuse an enemy. Some of the cruel things said about President Lincoln, particularly in the North, used to pierce him to the heart; but never in my presence did he evince a revengeful disposition.
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 Ulysses S. Grant
Everyone has his superstitions. One of mine has always been when I started to go anywhere, accomplished.
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 Ulysses S. Grant
One of my superstitions had always been when I started to go anywhere or do anything, not to turn back, or stop until the thing intended was accomplished. I have frequently started to go places where I had never been and to which I did not know the way, depending upon making inquiries on the road, and if I got past the place without knowing it, instead of turning back, I would go until a road was found turning in the right direction, take that, and come in by the other side.
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 Ulysses S. Grant