This course probes deeper into the concept of being by treating the respective structures of act and potency, essence and existence, substance and accident, and cause and effect. Many of the principles of metaphysics learnt here would relate to the study of the structures of mobile beings in Cosmology, that is, the intrinsic principles (quantity, quality, space, time, place and motion); the constitution (matter and form, atomism and dynamism); as well as the efficient and final causes.