In &quot;The Mastery of Destiny&quot;, written in 1909, the bestselling author of the inspirational classic &quot;As a Man Thinketh&quot; continues his life&#39;s goal of revealing universal principles-both spiritual and practical-to empower the individual.<br />Allen instructs readers on developing self-control, willpower, concentration, and motivation. Through discipline and mindfulness, we can create a life of unending happiness, prosperity, and, most importantly, self-mastery.&nbsp;