यदमृता देवा येनामृतत्वेन यदमृता अभूवन्, तेनैवामृतत्वेन विशिष्ट तदमृतो भवति, न न्यूनता नाप्यधिकता अमृतत्वे इत्यर्थ ॥
In plain words
With that very immortality through which the gods became immortal, the seeker is endowed, and thus he becomes immortal. There is neither any lack nor any excess in that immortality—this is the true import.
Close to the Sanskrit
By which immortality the gods became immortal, by that very immortality distinguished, he becomes immortal; there is no deficiency nor any excess in immortality, this is the meaning.