  This search for objective moral standards by which to guide action and reform society lies at the heart of the Mohist philosophical and political  project.[5]  The master idea driving Mohist thought is that in ethics and politics, as in any other practical field, we can indeed find and apply such standards, which the Mohists call fa (models, paradigms, standards). A text from one of the later portions of the Mozi explains the role of fa in this way: