Gandhi rejected the idea that injustice should, or even could, be fought against "by any means necessary"—if you use violent, coercive, unjust means, whatever ends you produce will necessarily embed that injustice. However, in the same book Gandhi admits that even though his book argues that machinery is bad, it was produced by machinery, which he says can do nothing good. Thus, he says, "sometimes poison is used to kill poison" and for that reason as long as machinery is viewed as bad it can be used to undo itself.