The Mastery of Destiny James Allen - 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.