Sthūla dhyāna — gross meditation. The practitioner clearly visualizes a divine form, typically the deity of their choosing.

“According to the rules” (yathā-nyāyam) indicates there are specific methods: size, position, details of the image. The visualization must be precise and complete.

This meditation is a “facilitator of happiness” because it works with the concrete, the accessible. For minds attached to the material, it is the natural starting point.