Metaphysics

Phaedo

Facts of Consciousness

Life: Its True Genesis

The Metaphysical Elements of Ethics

The Improvement of Human Reason

Absurdities of Immaterialism Or, A Reply to T. W. P. Taylder's Pamphlet, Entitled, “The Materialism of the Mormons or Latter-Day Saints, Examined and Exposed.”

History of Modern Philosophy

Eureka: A Prose Poem

An Enquiry Concerning Human Understanding

Mind and Life

You Can't Buy Eternity

The Creator, and what we may know of the method of creation

Bolax, Imp or Angel—Which

Sophist

Wisdom and Destiny

Man or Matter

The Philosophy of Spiritual Activity

Schopenhauer

The Meaning of the War: Life & Matter in Conflict

The Development of Metaphysics in Persia. A Contribution to the History of Muslim Philosophy