Read Philip K Dick, specifically his Valis "trilogy": combine drugs, God's 2nd coming, it's marketing campaign competing against junk food, time travel, and God changing it's multiple minds mind way through. There's Sci Fi and then there's Mind fuck Sci Fi, which PKD is the master, after perhaps William S. Bourroughs and Stanisław Lem, both startling writers requiring one to suspend conventional thinking of expectations of reality to comprehend where they are taking you.