Unitarian Universalists tend to hold the irrational belief that human beings are predominantly rational. Unitarian Universalists also tend to have faith in scientific insight, yet scientific investigations in psychology, neuroscience, sociology, cognitive science, etc., reveal that human beings are not predominantly rational beings.
This being the case, the belief that a determined individual can conduct his or her life on a rational basis is an example of magical thinking. And such belief is not in essence different from a belief in a supernatural deity, transubstantiation, reincarnation, etc. What do you think?