One verse

Srimad Bhagavatam 3.4.34

3.4.34

देहन्यासं च तस्यैवं धीराणां धैर्यवर्धनम् । अन्येषां दुष्करतरं पशूनां विक्लवात्मनाम् ॥ ३४ ॥

deha-nyasam ca tasyaivam dhiranam dhairya-vardhanam anyesam duskarataram pasunam viklavatmanam

deha-nyasam
entering the body
ca
also
tasya
His
evam
also
dhiranam
of great sages
dhairya
perseverance
vardhanam
increasing
anyesam
for others
duskara-taram
very difficult to ascertain
pasunam
of the beasts
viklava
disturbed
atmanam
of such a mind.

The Lord’s glorious acts and His acceptance of various transcendental forms for the performance of extraordinary pastimes in the mortal world are very difficult for anyone other than His devotees to understand, and for the beasts they are simply a mental disturbance.