AyinBase / Ayin Beis with R' Paltiel 26 Menachem Av, 5774
at about 12th line from top of the page (line begins, “ratzu...”) For text, click: Here or see below.
We are talking about the principle of the supremacy of the form over the material. It entails overpowering the material – hisgabrut hatzurah al hachomer.
Usually this refers to the refining of the body.
Then there is the process from the neshamah/soul perspective. The soul is the 'form' – it is not material.
So how does it pertain to the soul itself? The answer is that the soul experiences wondrous beyond worldly comprehension in Godliness. And in that pure state, the soul has a powerful pleasure. And despite this ecstasy it stays connected to the body. And this staying connected is the hisgabrut/domination of the form over the material on the soul level.
The soul has to nullify itself, before God's will to return to the body and the natural soul...
And this bitul/nullification allows it to return to being in the body. And this bitul is from the essence of the soul.