Full Idea
Atheistic materialism is necessarily revolutionary, for, if it is to be directed towards an absolute good here on earth, it has to place it in the future.
Gist of Idea
Atheistic materialism must be revolutionary, because its good is in the future
Source
Simone Weil (Gravity and Grace [1942], 'Harmony')
Book Reference
Weil,Simone: 'Gravity and Grace', ed/tr. Crawford/De Ruhr [Routledge 1952], p.173
A Reaction
Her alternative, of course, is a religious absolute good, which is presumably timeless. She must have Russia in mind. I'm not clear why atheistic materialists must believe in an absolute good. She says their great idea is 'progress'.