the soul uses the body as a vehicle in the material world.
consciousness is the interface between the body and the soul.
Mantra meditation when properly used can clear away false indentifications that develope from the consciousness working through this material body and mind
person get more control over his life by gaining control over his mind and senses.
person becomes more aware of his true identity as a spiritual being and not as his identification
such as his body, job, race, religion etc.
a person gets more in tune with his true identity and with the oversoul, universal energy, supreme truth ,Lord or whatever term you would like to use.
inner peacefulness-stress relief
Regular practice of the mantra meditation systematically unfolds one's full potential: enlivening the inner intelligence ,developing higher states of consciousness,allowing a person to develope his inherent consciousness while cutting away false indentifications.
This experience of the self-referral state enlivens orderliness, dynamism, and creativity within the meditator resulting in greater effectiveness and success in daily life.
this is explained in the Sanskrit vedas available in the meditation aides as the "Bhagavad-Gita, As It Is."
Try it for three weeks and see if your life is not changed.