Those therefore who observe this rule of Pragâpati (as laid down in §13), produce a pair, and to them belongs this Brahma-world here. But those in whom dwell penance, abstinence, and truth,

In plain words: Couples who follow this rule of Prajapati have children, and they gain the world of Brahma here, a world of happiness. But those who live with discipline, self-control and truth go further.