Metaphysics

Man or Matter

Phaedo

Time and Free Will

Life and Matter: A Criticism of Professor Haeckel's “Riddle of the Universe”

History of Modern Philosophy

Hints towards the formation of a more comprehensive theory of life

The Philosophy of Natural Theology

An Enquiry Concerning Human Understanding

The Philosophy of the Conditioned

You Can't Buy Eternity

Creation or Evolution? A Philosophical Inquiry

Metaphysical Horizons Unveiled

Freedom, Truth and Beauty

Life: Its True Genesis

Life's Basis and Life's Ideal: The Fundamentals of a New Philosophy of Life

Blue Guardians of Sadalsuud

Lectures on the Proofs of the Existence of God

The Distinction between Mind and Its Objects

Philosophy in the Last Forty Years

Reincarnation: A Study in Human Evolution