On breath depends the capability and efficiency with which one thoroughly does one's work. Shortness of breath gives man impatience, lack of endurance; and irregularity of the rhythm of the breath gives man confusion, and makes him inclined to be easily upset. Breath being the life-power, it is the same life-power which gives man strength to endure all things. One always will find that those who easily get cross, quickly upset, instantly annoyed, have something wrong with the breath.