स यदि पितृलोककामो भवति सं-कल्पादेवास्य पितरः समुत्तिष्ठन्ति तेनपितृलोकेन संपन्नो महीयते ॥ १ ॥
In plain words
If he desires the world of his ancestors, simply by his resolve his ancestors appear before him, and united with that ancestral world, he shines in glory.
Close to the Sanskrit
If he becomes desirous of the father-world, from his resolve alone ancestors rise up, and endowed with that father-world he is glorified.