The Mastery of Destiny is a companion to James Allen's The Life Triumphant. In The Mastery of Destiny Allen further reveals universal principles that can help empower each person. With emphasis on personal responsibility and harnessing one's inner power, Allen writes on the Science of Self-Control, Training of the Will, Cultivation of Concentration, the Power of Purpose, and the Joy of Accomplishment. James Allen was a British philosophical writer known for his inspirational books and poetry and as a pioneer of self-help movement. Allen's practical philosophy for successful living has awakened millions to the discovery that "they themselves are makers of themselves". Allen insists that it is within the power of each person to form his own character and create his own happiness.