Wasn't it St. Francis who said we are looking for that which is looking? My sense of "soul" is that it is "essence," but what is essence? It is not a thing. I have feelings, but I am not my feelings. I have sensations, but I am not my sensations. I have relationships but I am not my relationships. I say I am Earl but I am not Earl-but my name really is Earl.
There are those occasions when that all drops away and I simply Am, with no "I" involved. There is simply a sense of suchness as the Buddhists might say which I mean by "amness."In that state of no state everything seems co-extensive to me though there are no boundaries of extension.