I would compare the experience to a feeling of merging into 'God'. It is the transcending of space and time, as all is one there is omnipresence for everything must be simultaneously everywhere if there is only one infinite unchanging thing. It is the destruction of the self yet even without the self there is perception, it is similar to the notion that when our selves die they have merely transitioned by merging into one eternal entity that is not restricted by space or time. When the raindrop enters the ocean its individual identity is destroyed yet the destruction is more of a merging into something else, something that consists of countless drops of rain that used to all be individual but now no longer exist outside of the whole of the ocean. I imagine that if heaven was a real state of being it would be similar to ego death, except you would never come back into the form of a raindrop. If this was the case, or if after the death of our physical bodies and minds we merged into something reminiscent of ego death, rather than disappearing into oblivion, it would be beautiful and awesome. I guess the question is, are we like flames on a candle, which are blown out and disappear eternally, or are we like droplets of rain falling into the ocean, disappearing as individual droplets but merging into the ocean. Logically I believe we are more like the flames on a candle, when I take LSD I feel like we are droplets of rain.