Edmund Burke on When to RevoltReflections on the Revolution in France (J. Dodsley: 1790) pp. 43-4.
The speculative line of demarcation, where obedience ought to end, and resistance must begin, is faint, obscure, and not easily definable. It is not a single act, or a single event, which determines it. Governments must be abused and deranged indeed, before it can be thought of; and the prospect of the future must be as bad as the experience of the past. When things are in that lamentable condition, the nature of the disease is to indicate the remedy to those whom nature has qualified to administer in extremities this critical, ambiguous, bitter potion to a distempered state. Times, and occasions, and provocations, will teach their own lessons. The wise will determine from the gravity of the case; the irritable from sensibility to oppression; the high-minded from disdain and indignation at abusive power in unworthy hands; the brave and bold from the love of honourable danger in a generous cause : but, with or without right, a revolution will be the very last resource of the thinking and the good.