“For a demon there is no substance in the process of devotional service, but to a devotee devotional service is the only essential factor in life. Since Hiranyakashipu did not like devotional service, the essence of life, he chastised Prahlada Maharaja's teachers with harsh words.” (Shrila Prabhupada, Shrimad Bhagavatam, 7.5.26 Purport)