I saw that when people prayed, they imagined themselves in conversation with God. They do not, of course, think that God is imaginary, but they think that humans need to use their imagination to understand a God so much bigger and better than what they know from ordinary life. They imagine God as wiser and kinder than any human they know, and then they try to become the person they would be if they were always aware of being in God’s presence, even when the kids fuss and the train runs late.
If I were of a scabrous nature, I'd say "Duh". I'm not, though.