Yes, I experienced a very distinct, epiphany-like moment during a therapy session when I accepted my younger self as not being horrible or disgusting, even though I got picked on incessantly in school at the age we had been talking about. It was like my younger self said (not literally -- in feelings) "I'm not really that despicable, am I?" and I suddenly felt like "No -- no you are not." I had a feeling like an older kid taking a younger one under their wing and comforting them. I was so distracted and moved by what was going on internally that I really didn't say anything much the rest of that session but told my T about it next session.

Most of my other realizations / epiphanies happened outside of session and were a lot smaller than that one, but they were pretty regular, nearly every week.