One who does not breathe fully - in other words freely and deeply - can neither be well physically nor make use of his mental faculties. Very often one finds most learned and intelligent people unable to work as they wish to and incapable of finishing a work which they have taken up. Sometimes a person thinks it is from bodily weakness, or mental weakness, or lack of enthusiasm, or loss of memory, not knowing that it is very often a matter of regularizing the breath. Most often people think that it is the tired or exhausted condition of the external senses that prevents their thinking, but in reality it is the lack of right breathing, for right breathing can make the mental faculties clearer and the organs of the senses more capable of perceiving. This shows that the mind can live a fuller life by what I call full breath.