Abstract
This article analyzes the three texts of the existence of God who the thinker Francisco Suárez presented in his famous _Metaphysical Disputations_. In addition to the speculative interest and the degree of penetration of the author in the proofs, these are an example in itself to determine the specificity of Suarez’s interpretation of Metaphysics. Specifically, Suárez a priori shows the existence of a single and necessary entity in the third of the demonstrations, deducing it from the attribute of the unit. The distinction of reason attributes, bears witness to the different character of Suárez’s metaphysics. Meanwhile, the two previous tests of empirical nature, are intended to clean up the remains of philosophical paganism who were present in some of the physical evidence used by the first Scholastics. These were times of an apologetics battle within the Church, and Suárez, a member of the Jesus Society, reflects in all these texts the relevance of both material and intellectual instruments to be employed in the defense of the Catholic faith.