Summary of Philosophy for the Use of Schools - Cosmology, Psychology, and Natural Theology, Volume II - Tommaso Maria Zigliara

This second volume of Zigliara’s Summary of Philosophy for the Use of Schools develops the middle and higher branches of philosophical inquiry within a Thomistic framework grounded in Thomas Aquinas. It is designed as a structured academic text, guiding students from the study of the natural world to the human soul and finally to rational reflection on God.

The work begins with cosmology, treating the physical universe and its fundamental principles. Zigliara examines matter, form, motion, causality, and the laws governing natural bodies, presenting nature as an intelligible and ordered system governed by stable metaphysical structures.

It then turns to psychology (philosophical anthropology), analyzing the nature of the human soul and its faculties. The intellect, will, and sensory powers are carefully distinguished, with emphasis on the soul’s immaterial operations and its role as the form of the living human being.

The final section, natural theology (theodicy), considers what human reason can know about God apart from revelation. Topics include the existence of God, divine attributes, and providence, all presented through rational demonstration within a realist metaphysical outlook.

Throughout the volume, Zigliara maintains a clear and pedagogical style, presenting philosophy as a unified ascent from the study of nature to the principles of the human mind and ultimately to the affirmation of God as the first cause and ultimate explanation of all reality.