"Your own mind is a sacred enclosure in to which nothing harmful can enter except by your permission. Your own mind has the power to transmute every external phenomenon to its own purposes. " - A. BIn this volume are gathered two of Arnold Bennett's most inspiring essays on self-mastery and personal development. In The Human Machine (1908), he explores the inner workings of the mind as if it were a delicate yet powerful mechanism. With Mental Efficiency (1911), Bennett continues this exploration, focusing on the cultivation of intellectual alertness, concentration, and balanced living. Written in a lucid and engaging prose, these two classic texts invite readers to take command of their own "human machine" and to use it with intelligence, calm, and purpose.