Regarding your question about the individual soul becoming all-pervasive, the idea is completely nonsensical rascaldom. Such theory is simply a bluff. Artificially, by means of practical psychology, one can understand very little of another's thinking and feeling. But this is in no way all-pervasive. If any yogi says like that, especially the modern so-called yogis, it is simply falsehood. In however perfect stage of yoga one may be, he may understand something of another's mental condition, but this is never all-pervasive. This all-pervasive consciousness is possible only in the Supersoul.
Bhakti Devi is the expansion of Srimati Radharani. I hope this letter will meet you in very good health. Thanking you once more for your nice letter.