Encheiridion 1 focuses on what is up to us and contrasts the tranquil psychological state of those who focus their attention and impulse only on those things and events within their control with the troubled mind of those who attempt to control what is not in their power. The second chapter of Encheiridion further defines the concepts of desire and aversion and adds another important concept: things contrary to Nature. Encheiridion 2 opens with the following advice: Keep in mind that desire presumes your...