Among the living entities who live on the ground, only 400,000 are human species, and out of these 400,000 human species, many are uncivilized or unclean; they are not up to the standard of proper civilization
Other Books by Srila Prabhupada
Narada-bhakti-sutra (sutras 1 to 8 only)
Bhakti is so sublime that only through bhakti can one understand the constitutional position of the Lord. That is clearly stated in the Bhagavad-gītā (18.55): bhaktyā mām abhijānāti. "One can understand the Supreme Lord through devotional service, and by no other process." There are different processes of understanding the Absolute Truth, but if a person wants to understand the Supreme Lord as He is, he has to take to the process of bhakti-yoga. There are other mystic processes, such as karma-yoga, jñāna-yoga, and dhyāna-yoga, but it is not possible to understand the Supreme Lord, the Personality of Godhead, except through His devotional service. This is confirmed in the Fourth Chapter of the Bhagavad-gītā (4.3), where we learn that Kṛṣṇa spoke the Bhagavad-gītā to Arjuna simply because he was the Lord's devotee and friend. The Bhagavad-gītā teaches the process of bhakti-yoga, and therefore Lord Kṛṣṇa explained it to Arjuna because he was a great devotee. As far as spiritual life is concerned, becoming a devotee of the Lord is the highest perfection.
People are generally misled by the spell of the illusory energy of material nature. There are innumerable living entities within the material nature, and only some of them are human beings. According to the Vedic literature, there are 8,400,000 species of life. In the Padma Purāṇa it is said that there are 900,000 species of life in the water, 2,000,000 species of plants, 1,100,000 species of insects and reptiles, 1,000,000 species of birds, 3,000,000 species of beasts, and only 400,000 species of human beings. So the humans are the least numerous species of all.
All living entities can be divided into two divisions: those that can move and those that are stationary, such as trees. But there are also many further divisions. Some species fly in the air, some live in the water, and some live on the ground. Among the living entities who live on the ground, only 400,000 are human species, and out of these 400,000 human species, many are uncivilized or unclean; they are not up to the standard of proper civilization. From the historical point of view, the Āryans are the most civilized section of human beings, and among the Āryans, the Indians are especially highly cultured. And among the Indians, the brāhmaṇas are the most expert in knowledge of the Vedas.
The Vedic culture is respected all over the world, and there are people everywhere eager to understand it. The highest perfectional stage of understanding Vedic culture is explained in the Bhagavad-gītā, in the Fifteenth Chapter (15.15), where the Lord says that the purpose of all the Vedas is to understand Him (Lord Kṛṣṇa). Fortunate are those who are attracted to the Vedic cultural life.