Paramahansa Yogananda explains how the direction of magnetism is changed by Kriya Meditation Practice.
Although this is true of meditation in general also.
In man where the life energy flows, there the consciousness follows. The life current flowing downward from the brain carries the mind to the senses and to identify with the physical body and the domain of entangling matter. By the outward flow of prana to the senses of touch, sight, hearing, taste, and smell, they exert a magnetism of attachment to matter that habitually draws the consciousness outward, keeping one immersed in material consciousness and material desires. But through practice of the Kriya technique, the magnetism of sensory objects is over come by the building up of a stronger magnet in spine.
Yogis have known from time and immemorial that the flow of life force in the body can be consciously directed by use of the body’s natural magnets, the two hands and 2 feet, the eyes, the tongue, and the uvula - all the body parts to come in pairs - are positive and negative magnetic poles and conduct tremendous power when energized by a strong and concentrated will. By applying this knowledge, Jesus and other masters performed many miraculous healings through the life force (prana) transferred to the sick by “laying on of hands” sending energy outward, through the hands 🙌 whether at a distance or in proximity.
~Paramahansa Yogananda