Francisco Suárez, a key philosopher bridging scholasticism and early modern thought, dives into the intricacies of metaphysics. He explores the profound themes of existence and non-existence, delving into 'beings of reason'. The discussion navigates the relationship between abstract concepts and causation, shedding light on how earlier philosophical traditions shape these ideas. Suárez's insights reveal how metaphysics evolves, reflecting a critical transition in philosophical thought.