The Bible often warns against trusting the wrong sources (e.g., false prophets). But in the story of Balaam, the Bible warns against placing too much trust in the right sources -- in this case Moses. The Bible's warning is particularly pertinent to us today, since we are particularly prone to the error of excessively trusting our sources.
The famous Stanford marshmallow experiment was less about subsuming our self-destructive urges and more about trust. What was perceived as an irrational outcome -- eating the marshmallow before the 15 minutes were up -- had its roots very much in rational decision making, albeit influenced by our environment.
Congregants who only gave help to other members were twice as likely to fully trust their fellow worshipers as participants who neither gave nor received help. Members who only received help were nearly three times as likely to have the same high level of trust. But it was the combination of both that made the biggest difference.