Ego vs soul

Ego is a veil between you and God. Every creature has a nourishment from which it takes its strength. If you take that nourishment away, it perishes. Outwardness has a nourishment and inwardness has a nourishment, bodies have a nourishment and spirits have a nourishment, frames have a nourishment and hearts have a nourishment. Each people now know their drinking place.
The nourishment of the hearts is the remembrance of Him who makes hearts fluctuate.

"Surely hearts are at peace in the remembrance of God"
[Quran13:28].