'Itself' in the Bible

But the Law does not rest on or require faith [it has nothing to do with faith], but [instead, the Law] says, “He who practices them [the things prescribed by the Law] shall live by them [instead of faith].”

But each one must carefully scrutinize his own work [examining his actions, attitudes, and behavior], and then he can have the personal satisfaction and inner joy of doing something commendable without comparing himself to another.