208
Śrīmad-Bhāgavatam
[Canto 10, Ch. 10]
TRANSLATION
Appearing in bodies like those of an ordinary fish, tortoise and hog, You exhibit activities impossible for such creatures to perform—extraordinary, incomparable, transcendental activities of unlimited power and strength. These bodies of Yours, therefore, are not made of material elements, but are incarnations of Your Supreme Personality. You are the same Supreme Personality of Godhead, who have now appeared, with full potency, for the benefit of all living entities within this material world.
PURPORT
As stated in  Bhagavad-gītā  (4.7–8):
yadā yadā hi dharmasya glānir bhavati bhārata abhyutthānam adharmasya tadātmānaṁ sṛjāmy aham
paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām dharma-saṁsthāpanārthāya sambhavāmi yuge yuge
Kṛṣṇa appears as an incarnation when real spiritual life declines and when rogues and thieves increase to disturb the situation of the world. Unfortunate, less intelligent persons, bereft of devotional service, cannot understand the Lord's activities, and therefore such persons describe these activities as  kalpanā —mythology or imagination—because they are rascals and the lowest of men ( na māṁ duṣkṛtino mūḍhāḥ prapadyante narādhamāḥ ). Such men cannot understand that the events described by Vyāsadeva in the  Purāṇas  and other  śāstras  are not fictitious or imaginary, but factual.
Kṛṣṇa, in His full, unlimited potency, here shows that He is the Supreme Personality of Godhead, for although the two trees were so large and sturdy that even many elephants could not move them, Kṛṣṇa, as a child, exhibited such extraordinary strength that they fell down with