Calmness; the jewel of wisdom

From the book: As a Man Thinketh

Calmness of mind is a jewel of wisdom. It is the result of long and patient effort in self-control. Its
presence is an indication of ripened experience, and of a more than ordinary knowledge of the laws, operations, and effects of thought.

An individual becomes calm in the measure that they understands themselves as a thought evolved being, such knowledge necessitates the understanding of others being who they are as the result of their own thoughts. As right understanding develops the  individual sees more and more clearly the internal relations of things, by the action of cause and effect and so ceases to fuss and fume and worry and grieve, and remains poised, steadfast, serene.

The calm person, having learned how to govern themselves, knows how to adapt to others; and they,
in turn, reverence the spiritual strength, and feel that they can learn from and rely upon the calm
person. The more tranquil a person becomes, the greater is their success, their influence, their power
for good.

The strong, calm individual is always revered. Like a shade-giving tree in a thirsty land, or a sheltering rock in a storm. "Who doesn’t love a tranquil heart, a sweet-tempered, balanced life? It doesn’t matter whether it rains or shines, or what changes come to those possessing these blessings, they remain serene, and calm. That exquisite poise of character, which we call serenity, is the last lesson of culture. It is precious as wisdom. How insignificant mere money seeking looks in comparison with a serene life--a life that dwells in the ocean of Truth, beneath the waves, beyond the reach of tempests, in the Eternal Calm!

"How many people sour their lives, and ruin all that is sweet and beautiful by explosive tempers, who destroy their poise of character and make bad blood! The great majorities of people ruin their lives and mar their happiness by lack of self-control. How few people we meet in life that are well balanced. Who have that exquisite poise which is characteristic of the finished character! Yes, humanity surges with uncontrolled passion, life is tumultuous with ungoverned grief, and is blown about by anxiety and doubt. The wise, whose thoughts are controlled and purified, makes the winds and the storms of the soul obey them. Self-control is strength; Right Thought is mastery; Calmness is power.