I think he's talking about monism with the spider songs. Imagine you see a brown spider on a brown leaf, you consider them separate beings but they're the same color and they just blend in, I think Aaron is talking about how we are all one and that is his deepest belief. "I do not exist..." and the more he gets lost in how god is everywhere and in everything he just loses his identity in god "no more me no more belief" to the point where even his beliefs are overshadowed by god in all.
I think he's talking about monism with the spider songs. Imagine you see a brown spider on a brown leaf, you consider them separate beings but they're the same color and they just blend in, I think Aaron is talking about how we are all one and that is his deepest belief. "I do not exist..." and the more he gets lost in how god is everywhere and in everything he just loses his identity in god "no more me no more belief" to the point where even his beliefs are overshadowed by god in all.