Vastu Purush Mandala having 45 Devtas and Asuras.
Roga – the Weakener: The next energy field in the North-West direction is of Roga. This energy field weakens the strength but he also acts as a supporter. He is the one who destroys diseases and provides you with the power of support during tough times.
In contemporary terms you can understand the power of Roga as similar to an inverter which is used in houses for back up electric supply. The inverter keeps on consuming power and getting charged till it continues to receive electricity from mains supply.
In this sense it weakens the strength but at the same time, it immediately makes the stored electricity available for use in case of an electric failure from main supply. The power of Roga is responsible for doing this.