A class on Srimad Bhagavatam 7.9.13 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on February 20, 1976 in Mayapur, India.
A transcript of the class can be found here: https://goo.gl/6WNKbd.
Srimad Bhagavatam 7.9.13
sarve hy amī vidhi-karās tava sattva-dhāmno
brahmādayo vayam iveśa na codvijantaḥ
kṣemāya bhūtaya utātma-sukhāya cāsya
vikrīḍitaṁ bhagavato rucirāvatāraiḥ
O my Lord, all the demigods, headed by Lord Brahmā, are sincere servants of Your Lordship, who are situated in a transcendental position. Therefore they are not like us [Prahlāda and his father, the demon Hiraṇyakaśipu]. Your appearance in this fearsome form is Your pastime for Your own pleasure. Such an incarnation is always meant for the protection and improvement of the universe.