SB 5.19.25
prapta nr-jatim tv iha ye ca jantavo
jñana-kriya-dravya-kalapa-sambhrtam
na vai yaterann apunar-bhavaya te
bhuyo vanauka iva yanti bandhanam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Bharata-varsa offers the proper land and circumstances in which to execute devotional service, which can free one from the results of jñana and karma. If one obtains a human body in the land of Bharata-varsa, with clear sensory organs with which to execute the sankirtana-yajña, but in spite of this opportunity he does not take to devotional service, he is certainly like liberated forest animals and birds that are careless and are therefore again bound by a hunter.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the land of Bharata-varsa one can very easily perform the sankirtana-yajña, which consists of sravanam kirtanam visnoh, or one can perform other methods of devotional service, such as smaranam vandanam arcanam dasyam sakhyam and atma-nivedanam. In Bharata-varsa one has the opportunity to visit many holy places, especially Lord Caitanya’s birthsite and Lord Krsna’s birthsite — Navadvipa and Vrndavana — where there are many pure devotees who have no desire other than to execute devotional service (anyabhilasita-sunyam jñana-karmady-anavrtam), and one may thus become free from the bondage of material conditions. Other paths, such as the path of jñana and the path of karma, are not very profitable. Pious activities can elevate one to the higher planetary systems, and by speculative knowledge one can merge into the Brahman existence, but that is not real profit, for one has to come down again even from the liberated condition of being merged in Brahman, and certainly one must come down from the heavenly kingdom. One should endeavor to go back home, back to Godhead (yanti mad-yajino ’pi mam). Otherwise there is no difference between human life and the lives of jungle animals and birds. Animals and birds also have freedom, but because of their lower birth, they cannot use it. Taking advantage of all the facilities offered him, a human being who has taken birth in the land of Bharata-varsa should become a fully enlightened devotee and go back home, back to Godhead. This is the subject matter of the Krsna consciousness movement. The inhabitants of places other than Bharata-varsa have facilities for material enjoyment, but they do not have the same facility to take to Krsna consciousness. Therefore Sri Caitanya Mahaprabhu has advised that one who has taken birth as a human being in Bharata-varsa must first realize himself as a part and parcel of Krsna, and after taking to Krsna consciousness, he must distribute this knowledge all over the world.