"Faith comes by hearing"

[John V]

Never seen in a church? Never sung hymns with the congregation?

If singing together is trance stimulation, then that's in public schools, too.

The difference being a public school is for children with the purpose of education and church is for adults with the purpose of belonging to a group

Now you're reversing your previous claim that it's about the methods rather than the content.

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There's a branch of psychology devoted to understanding such "tricks." It's called educational psychology. People who employ the tactics are called teachers.