And this is the secret of what is written in the passuk "אם ישים אליו לבו רוחו ונשמתו אליו יאסוף," this happens with the secret of Yibbum, according to בסבא דמשפטים. And our explanation is just as we said -- just as it is within the power of the Yavam (the brother of the deceased husband) to return a part of the Nefesh of his father* [*it appears to me as if I might have mistranslated; I believe the text meant to say his brother] into this world through Yibbum, so too with this Yibbum, he is able to return and add onto [the child created through Yibbum] all of his Nefesh, and also his Ruach, and his Neshama into one body. However, this happens only through [the child doing] good deeds [the child must earn them]: