If a person has not renounced the world, in order to live the holy life in the Buddha Sangha…

… how can this person receive teachings, and training in practices of the holy life in the Buddha Sangha?   

If a person has not renounced sexual relations in the world, in order to live the holy life in the Buddha Sangha, how can this person receive teachings, and training in practices of the holy life, full of the most absolute chastity, in the Buddha Sangha?