The understanding of the symbols: 0 [Zero], ∞ [Infinity], 1 [One] and I [‘Self’] are mutually inseparable.
In other words, you understand all four. Or you understand none.
There is a fifth symbol: ? [‘God’]. It is a waste of time to go after it until you are in view of the other four. As for Brahman, don’t even think about thinking about it until you are in full view of the symbol ‘0’.