I've had some strange things happen to me since brain surgery. Most notably, I've encountered about 3 times a "Being of Light". I'll try my best to describe the experience. Although it's difficult to describe, and it sounds crazy even as I try to describe it - I'm not crazy. And these things really happened.
I don't remember what it said to me; I only remember my response towards it, because it seemed like my heart or my soul was responding to it. It was bright, shining and very vibrant, and it seemed to communicate telepathically or, with feelings. It posed a question to me. I don't remember the question; but my response was that I "still wanted to help people."
I am wondering if this could have possibly been a spirit guide.
At the time, I imagined that I was projecting my own unconscious and was somehow having a dialogue with it. This explanation doesn't make sense - but I'm grappling with a way to describe or understand what was going on. I considered that maybe it was a hallucination or I was going psychotic - but I"m not any of these. And I've asked my neuropsychologist (and have looked around) to see if other people who have surgery to correct epilepsy has had similar experiences. So, I'm considering and wondering whether I had spiritual helpers to guide me through the process. (I started seeing this being before the surgery).
Anyone have any thougts, especially those who do talk to or have gotten in touch with spirit guides? I'm willing to believe that it was just a hallucination, but this doesn't explain why I felt so vulnerable, like I was "being seen" as I spoke with it.
And by the way - the being looked like this picture, except it did not have a definite human-like form, and it didn't have wings. Its body was entirely composed of light. On one occassion I thought that it was "pure consciousness" or "pure thought" . It seemed as though its body was "composed" of consciousness, thought and feeling (if that makes sense). 
If you can imagine seeing/sensing a body of light talking without words, full of feeling and awareness, you can imagine what the experience was like. It was scary but I wasn't scared. Rather, it seemed "natural" to communicate telepathically. Or, maybe my brain was just swollen. I don't know....