1. Training must be there

    Before entering household life, one should be trained as a brahmacari, living under the care of the guru, whose place is known as the gurukula. Brahmacari guru-kule vasan danto guror hitam (Srimad-Bhagavatam 7.12.1). From the very beginning, a brahmacari is trained to sacrifice everything for the benefit of the guru. A brahmacari is advised to go begging alms door to door, addressing all women as mother, and whatever he collects goes to the benefit of the guru. In this way he learns how to control his senses and sacrifice everything for the guru.

    Srila Prabhupada, Srimad-Bhagavatam 7.6.9 purport