Meditation is not about concentration, not about focusing one’s thoughts on one thing, but instead on becoming thoughtless. It’s relaxation.
With meditation, the physiology undergoes a change and every cell in the body is filled with more energy. This results in joy, peace, enthusiasm as the level of energy in the body increases.
Meditation brings the brainwave pattern into an alpha state that promotes healing. It cleanses and nourishes you from within and calms you, whenever you feel overwhelmed, unstable, or emotionally shut down. And your mind becomes fresh, beautiful and delicate.
Source: Benefits of Meditation