If you think about it... our very existence is practically random electrical pulses running through our bodies. Everything we 'see', 'feel', 'think', and so forth are nothing more than a few sparks in our brains.
Our past, present, and future are all lived through some weird electrical patterns. Everything you know of, everything you remember is nothing more than weak electricity.
It's difficult to convey what I want through written words, but I hope you got what I meant.