The self-controlled ones are the only possessors of divine wisdom; those who have not mastered this in life are imperfect. Though they may have all riches, comfort and power, yet all this is as dross when the self is not under control. This can be learned by noticing how many virtuous people are at times drawn into sin, and how foolishly the wise sometimes act. Dominant natures often become enslaved, and even the healthy become diseased through lack of self-control.