A revolution can be neither made nor stopped. The only thing that can be done is for one of several of its children to give it a direction by dint of victories.
- Napoleon Bonaparte

In a revolution, as in a novel, the most difficult part to invent is the end.
- Alexis de Tocqueville

It is impossible to predict the time and progress of revolution. It is governed by its own more or less mysterious laws.
- Vladimir Lenin