'Itself' in the Bible

So too, faith, if it does not have works [to back it up], is by itself dead [inoperative and ineffective].

And the tongue is [in a sense] a fire, the very world of injustice and unrighteousness; the tongue is set among our members as that which contaminates the entire body, and sets on fire the course of our life [the cycle of man’s existence], and is itself set on fire by hell (Gehenna).