The human brain performs the function of thinking as involuntarily as — Breathing

"The old dispute about the relative virtues of the active way and the contemplative way is a spurious one. We require both. They are phases of a single rhythm like the pulsing of the heart, the in-drawing and letting go of breath, the ebb and flow of the tides. So we go deep, deep inwards in meditation to consolidate our vital energy, and then, with greater love and wisdom, we come out into the family, the community, the world."

"Cleanliness is necessary out of doors and in the human breathing. The imperil exhaled by irritated people is identical with filth, or shameful refuse. 293"

"Note also that a supermundane breath is single, without repetition. This is significant, for only in a lone breath can be summoned the full power of energy. With rapid repetition, shortness of breath can occur, which harms the work. The Thinker advised, “Understand the power of a supermundane breath.” 816."

"A bhikkhu, having gone to the forest, or to the foot of a tree, or to an empty, solitary place, sits down cross-legged, keeping his body erect, and directs his mindfulness. Then only with keen mindfulness he breathes in and only with keen mindfulness he breathes out. Breathing in a long breath, he knows, "I breathe in a long breath"; breathing out a long breath, he knows, "I breathe out a long breath"; breathing in a short breath, he knows, "I breathe in a short breath"; breathing out a short breath, he knows, "I breathe out a short breath"; "Aware of the whole breath body, I shall breathe in", thus he trains himself; "Aware of the whole breath body, I shall breathe out", thus he trains himself. "Calming the process of breathing, I shall breathe in", thus he trains himself; "Calming the process of breathing, I shall breathe out", thus he trains himself."

"We have pointed out the benefit of correct breathing before, and much research has been devoted to the subject, but in this book, “Supermundane,” one significant fact should be pointed out. In various fields of work, when feeling fatigued, people will interrupt their work or speech by taking a deep breath and thereby receive an influx of new energy. In most cases, they do this out of intuition, without giving thought to the process. How greatly would the power of this process be increased if it were performed consciously! Remember that this rejuvenating breath is supermundane, for by it man summons Higher Forces. He should understand that for greater effect, he should consciously turn to the Supermundane World and affirm his inner link with the Reservoir of Be-ness. Some workers, when pausing to take a deep breath, close their eyes. Their intuition is correct, for closing the eyes increases their concentration. ...816."

"Each exhalation sends out emanations of psychic energy. Each man lavishly saturates space; therefore he is obligated to show concern about a better quality of psychic energy. If people would understand that each breath has a significance for space, they would take care to purify their breathing. With the simplest apparatus the emanations of psychic energy can be demonstrated. One can see in the swings of the pendulum of life how continuously the energy vibrates. The same means shows the radiations called the aura, which indicates that particles of the aura are being sent out ceaselessly into space, and psychic energy continually weaves a new protective net. He who speaks about the inconclusiveness of experiments with psychic energy will usually be one who does not ponder at all about its existence. Dense ignorance contributes to the poisoning of the atmosphere. This must be understood in its literal meaning. Pure breathing is not attained by means of medicines. Psychic energy is the basis of purifying the breathing. 339"