He was a brilliant and moral man. A Ba’al Teshuvah of great conviction. A deep philosopher. S good Yid.
He didn’t really learn in Yeshivos. Or have a Mehalech ha’Limud. He was not a Posek. Nor did he have a Rebbi similar to that which you seem to be seeking.
And this was probably the Shoresh of the Machlokes.