 The fruit of this study is a two-volume work bearing the title, De la recherche de la vérité. Où l’on traitte de la nature de l’esprit de l’homme, et de l’usage qu’il en doit faire pour eviter l’erreur dans les sciences (Search after Truth. In which is treated the nature of the human mind and the use that must be made of it to avoid error in the sciences ) (1674–75). It is primarily this text which provides the basis for Malebranche’s reputation in the modern period. As its full title indicates, the Recherche focuses on the principal sources of human error and on the method for avoiding those errors and for finding the truth. The first five books enumerate the various errors deriving from the senses, imagination, pure understanding, inclinations and passions, respectively, and a sixth book is devoted to the Cartesian method of avoiding such errors through attention to clear and distinct ideas. The centerpiece of the third book, on pure understanding, is a defense of the claim that the ideas through which we perceive bodies exist in God. Tucked away in the final book, on method, is a critique of “the most dangerous error of the ancients,” namely, the Aristotelian position that there are secondary causes in nature distinct from God.