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Pranayam means control of pran or vital force. According to the sage Patanjali it means controlled breathing which includes deep inhaling, exhaling and retention of breath. Pranayam occupies a central position in the Indian yogic system. Modern medical science has shown unequivocally that Pranayam benefits both the mind and body.
My father, who went to jail for two-and-a-half years in 1942 for his role in the independence movement, told me that the greatest gift that Gandhiji gave to all Indians (besides independence) was to rid them of their fear of Englishmen. This removal of fear brought in a quantum jump in the mindset of Indians and made them aware that they could manage their own affairs with their own people.
I believe that presence or aura is a radiation of thought that a human being emits and is felt by everybody who encounters that person. A person's presence could either be evil, spiritual or simply pleasant and it is determined by the individual's thoughts, his/her mind.