SB 6.16.58

labdhveha mānuṣīṁ yoniṁ
 jñāna-vijñāna-sambhavām
ātmānaṁ yo na buddhyeta
 na kvacit kṣemam āpnuyāt
Word for word: 
labdhvā — achieving; iha — in this material world (especially in this pious land of Bhārata-varṣa, India); mānuṣīm — the human; yonim — species; jñāna — of knowledge through Vedic scriptures; vijñāna — and practical application of that knowledge in life; sambhavām — wherein there is a possibility; ātmānam — one’s real identity; yaḥ — anyone who; na — not; buddhyeta — understands; na — never; kvacit — at any time; kṣemam — success in life; āpnuyāt — can obtain.
Translation: 
A human being can attain perfection in life by self-realization through the Vedic literature and its practical application. This is possible especially for a human being born in India, the land of piety. A man who obtains birth in such a convenient position but does not understand his self is unable to achieve the highest perfection, even if he is exalted to life in the higher planetary systems.
Purport: 

This statement is confirmed in Caitanya-caritāmṛta (Ādi 9.41). Lord Caitanya said:

bhārata-bhūmite haila manuṣya-janma yāra
 janma sārthaka kari’ kara para-upakāra

Everyone born in India, especially as a human being, can achieve the supreme success through the Vedic literature and its practical application in life. When one is perfect, he can render a service for the self-realization of the entire human society. This is the best way to perform humanitarian work.