Because the remark was an actual fact, it was unpalatable talk to Vidura, and it was accepted as a direct insult. He therefore decided to quit his paternal house and prepare for the renounced order of life. This preparatory stage is called vānaprastha-āśrama, or retired life for traveling and visiting the holy places on the surface of the earth. In the holy places of India, like Vṛndāvana, Hardwar, Jagannātha Purī, and Prayāga, there are many great devotees, and there are still free kitchen houses for persons who desire to advance spiritually.
(Srimad Bhagavatam-----1:13:9-----purport).

The scientific system of varṇāśrama-dharma divides the human life into four divisions of occupation and four orders of life. The four orders of life as brahmacārī, gṛhastha, vānaprastha and sannyāsī are to be followed by all, irrespective of the occupational division.
(Srimad Bhagavatam-----1:15:9-----purport).

Vidura wanted to purify himself by traveling to all the sacred places, which are so situated that anyone who goes there automatically becomes purified. This is especially true in Vṛndāvana; any person may go there, and even if he is sinful he will at once contact an atmosphere of spiritual life and will automatically chant the names of Kṛṣṇa and Rādhā. That we have actually seen and experienced. It is recommended in the śāstras that after retiring from active life and accepting the vānaprastha (retired) order, one should travel everywhere to places of pilgrimage in order to purify himself.
(Srimad Bhagavatam-----3:20:4-----purport).

Just as in the vānaprastha stage the wife follows the husband, similarly when the spiritual master retires for nirjana-bhajana, some of his advanced devotees follow him and engage in his personal service. In other words, those who are very fond of family life should come forward in the service of the spiritual master and abandon so-called happiness afforded by society, friendship and love.
(Srimad Bhagavatam-----3:28:34-----purport).

The wife especially should remain austere, not desiring luxurious dresses and living standards. She should accept only the bare necessities of life and minimize her eating and sleeping. There should be no question of mating. Simply by engaging in the service of her exalted husband, who must be a pure devotee, the wife will never be agitated by sex impulses. The vānaprastha stage is exactly like this. Although the wife remains with the husband, she undergoes severe austerities and penances so that although both husband and wife live together, there is no question of sex.
(Srimad Bhagavatam-----3:28:44-----purport).

Everyone should therefore seek the shelter of the Supreme Soul, the source of all living entities. No one should waste his time in the so-called happiness of materialistic household life. In the Vedic civilization, this type of crippled life is allowed only until one's fiftieth year, when one must give up family life and enter either the order ofvānaprastha (independent retired life for cultivation of spiritual knowledge) or sannyāsa (the renounced order, in which one completely takes shelter of the Supreme Personality of Godhead).
(Srimad Bhagavatam-----5:18:13-----purport).

Mahārāja Dhṛtarāṣṭra accepted the order of vānaprastha, and at this stage the wife is allowed to remain as a voluntary servitor, but in the sannyāsa stage no wife can stay with her former husband. A sannyāsī is considered to be a dead man civilly, and therefore the wife becomes a civil widow without connection with her former husband. Mahārāja Dhṛtarāṣṭra did not deny his faithful wife, and she followed her husband at her own risk.
(Srimad Bhagavatam-----1:13:30-----purport).

The householder who associates with woman under scriptural restrictions, after a thorough training of brahmacarya, cannot be a householder like cats and dogs. Such a householder, after fifty years of age, would retire from the association of woman as a vānaprastha to be trained to live alone without the association of woman. When the practice is complete, the same retired householder becomes a sannyāsī, strictly separate from woman, even from his married wife.
(Srimad Bhagavatam-----2:7:6-----purport).

The four statuses and orders of human society—brāhmaṇas, kṣatriyas, vaiśyas and śūdras, as wall as brahmacārīs, gṛhasthas, vānaprasthas and sannyāsīs—are all divisions of quality, education, culture and spiritual advancement attained by practicing control of the mind and the senses. All these divisions are based on the particular nature of each individual person, not on the principle of birth.
(Srimad Bhagavatam-----3:7:29-----purport).

The nucleus of the four social orders—brahmacarya, or student life, gṛhastha, or householder family life, vānaprastha, or retired life for practicing penance, and sannyāsa, or renounced life for preaching the truth—is the four legs of religion. The vocational divisions are the brāhmaṇas, or the intelligent class, the kṣatriyas, or administrative class, the vaiśyas, or mercantile productive class, and the śūdras, or general laborer class who have no specific qualifications. All were systematically planned and created by Brahmā for the regular promotion of self-realization.
(Srimad Bhagavatam-----3:12:41-----purport).

The man who lives with a wife has a great responsibility in maintaining the members of the other social orders—the brahmacārīs, vānaprasthas and sannyāsīs. Except for the gṛhasthas, or the householders, everyone is supposed to engage in the spiritual advancement of life, and therefore the brahmacārī, the vānaprastha and the sannyāsī have very little time to earn a livelihood. They therefore collect alms from the gṛhasthas, and thus they secure the bare necessities of life and cultivate spiritual understanding. By helping the other three sections of society cultivate spiritual values, the householder also makes advancement in spiritual life.
(Srimad Bhagavatam-----3:14:18-----purport).

Worship of the Deity of the Supreme Personality of Godhead is prescribed herewith even for persons who are simply discharging their prescribed duties. There are prescribed duties for the different social classes of men—the brāhmaṇas, the vaiśyas, the kṣatriyas and the śūdras—and for the different āśramas-brahmacarya, gṛhastha, vānaprastha and sannyāsa. One should worship the Deity of the Lord until one appreciates the presence of the Lord in every living entity. In other words, one should not be satisfied simply by discharging his duties properly; he must realize his relationship and the relationship of all other living entities with the Supreme Personality of Godhead. If he does not understand this, then even though he discharges his prescribed duties properly, it is to be understood that he is simply laboring without profit.
(Srimad Bhagavatam-----3:29:25-----purport).

Kapiladeva had no more need to stay at home, so He took permission from His mother and left. Apparently He left home for spiritual realization, although He had nothing to realize spiritually because He Himself is the person to be spiritually realized. Therefore this is an example set by the Supreme Personality of Godhead while acting like an ordinary human being so that others might learn from Him. He could, of course, have stayed with His mother, but He indicated that there was no need to stay with the family. It is best to remain alone as a brahmacārī, sannyāsī or vānaprastha and cultivate Kṛṣṇa consciousness throughout one's whole life.
(Srimad Bhagavatam-----3:33:12-----purport).

The Vedic activities are so designed that the conditioned soul who has come to enjoy the material world may do so under direction so that at the end he becomes detached from such material enjoyment and is eligible to enter into the transcendental position. The four different social orders—brahmacarya, gṛhastha, vānaprastha and sannyāsa—gradually train a person to come to the platform of transcendental life. The activities and dress of a gṛhastha, or householder, are different from those of a sannyāsī, one in the renounced order of life. It is impossible for one person to adopt both orders.
(Srimad Bhagavatam-----4:4:20-----purport).