  The form that produces “science” is its “method of proceeding.” Now “the end imposes necessity on the means, since ‘teeth are sharp in order to cut,’ as Aristotle says.” Since theology is “designed to promote the faith,” it employs “the method of argumentation or inquiry” first developed by Aristotle. By adapting the philosophical method to the data of faith, theology attempts to “confound the adversaries of the faith,” “strengthen those weak in their faith,” and “delight those whose faith is complete.” Bonaventure situated theology within the hierarchy of the sciences by adverting to Aristotle’s notion of “subalternated sciences.” The Philosopher had recognized that optics—which studies visible lines—is a science “subalternated” to geometry—which studies lines as such. Theology depends upon Scripture in a similar way, for scripture offers certain truths to be believed, but theology looks at the same truths “as made intelligible.” In this way, theology is different from the faith it tries to understand and from the Scripture that offers faith to  us.[11]