sarvesam eva jantunam

 satatam deha-posane

asti prajña samayatta

 ko visesas tada nrnam

 

labdhvehante manusyatvam

 hitva dehady-asad-graham

atma-srtya vihayedam

 jivatma sa visisyate

 

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 

 

A desire to maintain body, wife and children is also observed in animal society. The animals have full intelligence to manage such affairs. If a human being is simply advanced in this respect, what is the difference between him and an animal? One should be very careful to understand that this human life is attained after many, many births in the evolutionary process. A learned man who gives up the bodily conception of life, both gross and subtle, will, by the enlightenment of spiritual knowledge, become a prominent individual spirit soul, as the Supreme Lord is also.

 

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:  

 

It is said that man is a rational animal, but from this verse we can also understand that rationality exists even in animal life. Unless there is rationality, how can an animal maintain its body by working so hard? That the animals are not rational is untrue; their rationality, however, is not very advanced. In any case, we cannot deny them rationality. The point is that one should use one’s reason to understand the Supreme Personality of Godhead, for that is the perfection of human life.