4483.Manu/Shatrupa's penance, showed in their bodies,but their steadfast devotion was not disturbed.

The power of the Sankalp, A promise before God. The inner conviction & determination to reach the desired result.
This was the manner in which King Manu & his wife Shatrupa conducted their devotions.
One pointed devotion, ...both the wife & the husband were equal in their pursuit, so much so, they are transformed from a state of royalty to that state of yogis, detached totally from their former life in the Palace. They had one goal & one mind fixed together in devotion.