"Your father was your model for God." (18.46)
Our narrator's father comes across as distant—and kind of a jerk—so it's no wonder he thinks of God in a similar fashion.
"Believe in me and you shall die, forever." (18.121)
Tyler is almost a Jesus figure, but a perverse one. Whereas Christianity promises eternal life, Tyler promises eternal death. Of course to him, death is an honor. Only in death do the members of Project Mayhem achieve recognition.
You can't teach God anything. (30.24)
Our narrator has kind of given up here. Mainly, he's given up on Project Mayhem and his attempt to make a change. Both his father and the upper-class could be models for God, and our narrator has decided that they'll never learn new tricks.