Unlike photography which records an image as seen from a single viewpoint, a hologram is a record of an image as seen from many viewpoints.
Imagine your small self ( “I am”) as a hologram image reflected between 3 lenses; time, space and mind. The resulting image is made of tiny dots of endless concepts (your name, age, identity, gender, childhood experiences, profession, nationality, religion etc). When time, space and mind vanished, a fusion of all the dots (your concepts) occurs in an instant. The 3 lenses merge to be one, and the holographic image disappears. This is where you start experiencing oneness beyond your definitions as a self.