Timothy Sprigge was one of the leading exponents of philosophical idealism in the last fifty years. His scholarly work in the history of modern philosophy focused on Baruch Spinoza, William James, Josiah Royce, George Santayana, F. H. Bradley, Arthur Schopenhauer, Edmund Husserl, and Alfred North Whitehead: this eventually led to the construction of his own original system of metaphysics he called 'panpsychistic absolute idealism'. Idealism, long unfashionable, has been coming back into favour, and Sprigge's work has found a new readership. This selection of his finest essays ranges widely over metaphysics, ethics, and the history of philosophy: all the themes that he discusses are drawn together in his unique philosophical system, based upon his original theory of the nature of consciousness.