How does fasting on Ekadashi increase our love for Krishna?

From Praveen Nayak Prabhu
Prabhuji – In NOD Chapter 7 in the section Observing fasting on Ekadashi it is said “The basic principle is not just to fast, but to increase one’s faith and love for Govinda, or Kṛṣṇa.”

Could you please explain – How would doing fast increase ones faith and love for Krishna ?