"Precisely at the present time, when no such organisation yet exists, and when the revolutionary movement is rapidly and spontaneously growing, we already observe two opposite extremes (which, as is to be expected, 'meet'). These are: the utterly unsound Economism and the preaching of moderation, and the equally unsound 'excitative terror', which strives 'artificially to call forth symptoms of the end of the movement, which is developing and strengthening itself, when this movement is as yet nearer to the start than to the end'"

-Lenin in What is to be Done? on the subject of flashy, clandestine terrorist cells and their tactics in Russia, of which his brother was a part of (Narodnaya Volya) and was executed as a result