“We accept particular bodies in our dreams to be ourselves. We may dream that we are king, or dream that we are pauper, or a woman. In the dream we are thinking “This is me.” When we wake up, we find that it was a dream and that the temporary dream body is disappeared.
So in a similar way, by the influence of material nature, we get a particular body in this life, and we identify with this body that it’s ourselves. When we actually wake up to our real eternal identity, we find that this temporary body is not our real self.
When we dream, it lasts for a few seconds; we sleep during night five ti six or even seven hours. We have this temporary body for say hundred years or fifty years, or seventy years. So relatively speaking, that seems much more real.
Dreams may change often. In relation to our eternal self, this temporary body which we get from the material world is also just like a flash, a very short period of time. Therefore, it could be compared to a dream.
When we are in a dream, it seems real to us. We are experiencing happiness, pleasures, sadness, anxiety or fear, depending on whether it’s a nice dream or nightmare.”HH Jayapataka Swami
Lecture on Srimad Bhagavatam