According to Vedic system, there should be four classes of men: the brahmana, ksatriya, vaisya, sudra, social order; and spiritual order: brahmacari, grhastha, vanaprastha, and sannyasa. This is perfect system of human civilization

Expressions researched:
"According to Vedic system, there should be four classes of men: the brāhmaṇa, kṣatriya, vaiśya, śūdra, social order; and spiritual order: brahmacārī, gṛhastha, vānaprastha, and sannyāsa. This is perfect system of human civilization"

Bhagavad-gita As It Is Lectures

According to Vedic system, there should be four classes of men: the brāhmaṇa, kṣatriya, vaiśya, śūdra, social order; and spiritual order: brahmacārī, gṛhastha, vānaprastha, and sannyāsa. This is perfect system of human civilization. So I shall briefly describe. Brāhmaṇa is compared with the head. Just like you have got your body. In the body there are different departments: the head department, the arms department, the belly department, and the leg department.

Lecture on BG 2.9 -- Auckland, February 21, 1973:

Prabhupāda:

evam uktvā hṛṣīkeśaṁ

guḍākeśaḥ parantapaḥ

na yotsya iti govindam

uktvā tūṣṇīṁ babhūva ha

(BG 2.9)

Ladies and gentlemen, I thank you very much for your coming here and participate in this great movement. So this evening I shall present before you topics between Kṛṣṇa and Arjuna. I think most of you know the Bhagavad-gītā. The subject matter of Bhagavad-gītā is talking between Kṛṣṇa and Arjuna. Kṛṣṇa was driver of the chariot. Both of them were in the Battlefield of Kurukṣetra. Kṛṣṇa, the Supreme Personality of Godhead, He played just like an ordinary human being as friend of Arjuna. And when Arjuna was little disturbed . . . Because this battle was arranged between two parties of cousin-brothers . . . And when Arjuna saw the other party, all his relatives, family members, so he hesitated to fight, and there was some argument. Kṛṣṇa said that "You are a kṣatriya. You are king. It is your duty to fight."

According to Vedic system, there should be four classes of men: the brāhmaṇa, kṣatriya, vaiśya, śūdra, social order; and spiritual order: brahmacārī, gṛhastha, vānaprastha, and sannyāsa. This is perfect system of human civilization. So I shall briefly describe. Brāhmaṇa is compared with the head. Just like you have got your body. In the body there are different departments: the head department, the arms department, the belly department, and the leg department. So to maintain your body fit, you must have all these four departments rightly working. Your brain must work very nicely, your arms must work very nicely, although also the digestive system, intestines, stomach, that must also work very nicely, as well as the legs also must work nicely. Then you are perfectly fit. Similarly, in the social system there must be the head department. (aside:) This child is disturbing. The head department means the most intellectual part of the society, the most intelligent portion of the society. In the society there are naturally four classes of men, very intelligent class of men, politicians, mercantile people and ordinary workers, in every society all over the world, all over the universe. You can name them differently, but these four classes are there. That is by nature's system. Cātur-varṇyaṁ mayā sṛṣṭaṁ guṇa-karma-vibhāgaśaḥ (BG 4.13). By nature's way or by God's arrangement, there are four classes of men. The most intelligent class of men is called the brāhmaṇas. Intelligent means one who knows up to the Supreme Lord. And then next intelligent class: the politicians, administrators. Next intelligent class: the mercantile class, traders. And the fourth class man means worker. They have no intelligence, but they depend on others for their livelihood. So there are first-class, second-class, third-class, fourth-class men everywhere, any part of the world.