...from the perspective of Advaita.
https://youtu.be/YKqPa-o2ri4?t=2934
It's about 7 or 8 minutes from that point of the talk
"Jnana Yoga – The Path of Inquiry".
Now consider a lucid dream where the actual nature of the dream is realized. It's an actual experience, not a concept. From my experience it can be exactly like that in a waking equivalent.