“This is called the World Breath or ‘Seven’ Breath, and was much practised by the ancient Egyptians who were adepts at physical and physiological culture. Seven, as you know, plays an important part in the plan of the Universe which affects tnis Earth, as for instance, the 7 planets, 7 colours of the spectrum, 7 notes of music, 7 days of the week, etc. If we practise the Seven Breath every morning on awakening, we will tune ourselves in to the forces of growth and progress and derive great benefit and strength from so doing, provided we neither strain nor jerk.”

Source: Humanity Comes of Age, A study of Individual and World Fulfillment (1950), Chapter XV The Essential Science of Breathing