Visualization in meditation is a necessary element in metaphysical treatment. In order to manifest your desires, a mental image of their fulfillment must be present in your mind. Obviously if you're distracted or your thoughts are jumping around, it will be difficult to maintain this image. Other traditions may encourage one to use a religious icon as a visual image. Both approaches are effective.
Prayer is synonomous with metaphysical treatment, though implemented in a distinctive way.
The communion with this Higher Power must be intimate enough to experience a sense of oneness with it. From that vantage point one visualizes their goal or desire. When the treatment is completed, it is surrendered to the Higher Power for execution. Elevating one's Spirit is an essential aspect of metaphysical meditation and treatment. One may perform a metaphysical treatment for their own soul growth or to heal the wounded soul of another.