Definition of self-mastery
: the ability to control one's own desires or impulses : self-control, self-discipline
However, I realized the wisdom of Rooke's advice, and went away by myself to get over my anger and reacquire my self-mastery.— Bram Stoker
Self-esteem that is not backed by self-mastery becomes narcissism.— Gracie Bonds Staples
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Merriam-Webster unabridged
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Time Traveler for self-mastery
The first known use of self-mastery was in 1652
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